def test_krclassifier(self):
"""
Second test with the KerasClassifier.
:return:
"""
# Get MNIST
batch_size, nb_train, nb_test = 100, 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
# Create simple CNN
model = Sequential()
model.add(Conv2D(4, kernel_size=(5, 5), activation='relu', input_shape=(28, 28, 1)))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Flatten())
model.add(Dense(10, activation='softmax'))
model.compile(loss=keras.losses.categorical_crossentropy, optimizer=keras.optimizers.Adam(lr=0.01),
metrics=['accuracy'])
# Get classifier
krc = KerasClassifier((0, 1), model, use_logits=False)
krc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=2)
# Attack
nf = NewtonFool(krc)
nf.set_params(max_iter=5)
x_test_adv = nf.generate(x_test)
self.assertFalse((x_test == x_test_adv).all())
y_pred = krc.predict(x_test)
y_pred_adv = krc.predict(x_test_adv)
y_pred_bool = y_pred.max(axis=1, keepdims=1) == y_pred
y_pred_max = y_pred.max(axis=1)
y_pred_adv_max = y_pred_adv[y_pred_bool]
self.assertTrue((y_pred_max >= y_pred_adv_max).all())
def test_emp_robustness_mnist(self):
# Get MNIST
(x_train, y_train), (_, _), _, _ = load_mnist()
x_train, y_train = x_train[:NB_TRAIN], y_train[:NB_TRAIN]
# Get classifier
classifier = self._cnn_mnist_k([28, 28, 1])
classifier.fit(x_train, y_train, batch_size=BATCH_SIZE, nb_epochs=2)
# Compute minimal perturbations
params = {"eps_step": 1.1}
emp_robust = empirical_robustness(classifier, x_train, str('fgsm'),
params)
self.assertEqual(emp_robust, 0.)
params = {"eps_step": 1., "eps": 1.}
emp_robust = empirical_robustness(classifier, x_train, str('fgsm'),
params)
self.assertAlmostEqual(emp_robust, 1., 3)
params = {"eps_step": 0.1, "eps": 0.2}
emp_robust = empirical_robustness(classifier, x_train, str('fgsm'),
params)
self.assertLessEqual(emp_robust, 0.21)
def test_clever_l2_same_target(self):
batch_size = 100
(x_train, y_train), (x_test, _), _, _ = load_mnist()
# Get the classifier
krc = self._create_krclassifier()
krc.fit(x_train,
y_train,
batch_size=batch_size,
nb_epochs=2,
verbose=0)
scores = clever(krc,
x_test[0],
5,
5,
3,
2,
target=np.argmax(krc.predict(x_test[:1])),
c_init=1,
pool_factor=10)
self.assertIsNone(
scores[0],
msg="Clever scores for the predicted class should be `None`.")
def test_save_load_mlp(self):
NB_TRAIN = 100
NB_TEST = 10
comp_params = {'loss': 'categorical_crossentropy',
'optimizer': 'adam',
'metrics': ['accuracy']}
session = tf.Session()
keras.backend.set_session(session)
# get MNIST
(X_train, Y_train), (X_test, Y_test), _, _ = load_mnist()
X_train, Y_train, X_test, Y_test = X_train[:NB_TRAIN], Y_train[:NB_TRAIN], X_test[:NB_TEST], Y_test[:NB_TEST]
im_shape = X_train[0].shape
classifier = MLP(im_shape, act="brelu")
classifier.compile(comp_params)
# Fit the classifier
classifier.fit(X_train, Y_train, epochs=1, batch_size=BATCH_SIZE)
path = "./tests/save/mlp/"
# Test saving
save_classifier(classifier, path)
self.assertTrue(os.path.isfile(path + "model.json"))
self.assertTrue(os.path.getsize(path + "model.json") > 0)
self.assertTrue(os.path.isfile(path + "weights.h5"))
self.assertTrue(os.path.getsize(path + "weights.h5") > 0)
# Test loading
loaded_classifier = load_classifier(path)
scores = classifier.evaluate(X_test, Y_test)
scores_loaded = loaded_classifier.evaluate(X_test, Y_test)
self.assertAlmostEqual(scores, scores_loaded)
def test_clever_l2_no_target(self):
batch_size = 100
(x_train, y_train), (x_test, _), _, _ = load_mnist()
# Get the classifier
krc = self._create_krclassifier()
krc.fit(x_train,
y_train,
batch_size=batch_size,
nb_epochs=2,
verbose=0)
scores = clever(krc,
x_test[0],
5,
5,
3,
2,
target=None,
c_init=1,
pool_factor=10)
logger.info("Clever scores for n-1 classes: %s %s", str(scores),
str(scores.shape))
self.assertEqual(scores.shape, (krc.nb_classes - 1, ))
def test_mnist(self):
session = tf.Session()
keras.backend.set_session(session)
# get MNIST
(X_train, Y_train), (X_test, Y_test), _, _ = load_mnist()
X_train, Y_train, X_test, Y_test = X_train[:
NB_TRAIN], Y_train[:
NB_TRAIN], X_test[:
NB_TEST], Y_test[:
NB_TEST]
im_shape = X_train[0].shape
classifier = CNN(im_shape, act="relu")
classifier.compile({
'loss': 'categorical_crossentropy',
'optimizer': 'adam',
'metrics': ['accuracy']
})
# Fit the classifier
classifier.fit(X_train, Y_train, epochs=1, batch_size=BATCH_SIZE)
scores = classifier.evaluate(X_test, Y_test)
print("\naccuracy: %.2f%%" % (scores[1] * 100))
def setUpClass(cls):
k.set_learning_phase(1)
# Get MNIST
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train, x_test, y_test = x_train[:
NB_TRAIN], y_train[:
NB_TRAIN], x_test[:
NB_TEST], y_test[:
NB_TEST]
cls.mnist = (x_train, y_train), (x_test, y_test)
# Keras classifier
cls.classifier_k = cls._cnn_mnist_k([28, 28, 1])
cls.classifier_k.fit(x_train,
y_train,
batch_size=BATCH_SIZE,
nb_epochs=2)
scores = cls.classifier_k._model.evaluate(x_train, y_train)
logger.info('[Keras, MNIST] Accuracy on training set: %.2f%%',
(scores[1] * 100))
scores = cls.classifier_k._model.evaluate(x_test, y_test)
logger.info('[Keras, MNIST] Accuracy on test set: %.2f%%',
(scores[1] * 100))
# Create basic CNN on MNIST using TensorFlow
cls.classifier_tf = cls._cnn_mnist_tf([28, 28, 1])
cls.classifier_tf.fit(x_train,
y_train,
nb_epochs=2,
batch_size=BATCH_SIZE)
scores = get_labels_np_array(cls.classifier_tf.predict(x_train))
acc = np.sum(np.argmax(scores, axis=1) == np.argmax(
y_train, axis=1)) / y_train.shape[0]
logger.info('[TF, MNIST] Accuracy on training set: %.2f%%',
(acc * 100))
scores = get_labels_np_array(cls.classifier_tf.predict(x_test))
acc = np.sum(np.argmax(scores, axis=1) == np.argmax(
y_test, axis=1)) / y_test.shape[0]
logger.info('[TF, MNIST] Accuracy on test set: %.2f%%', (acc * 100))
# Create basic PyTorch model
cls.classifier_py = cls._cnn_mnist_py()
x_train, x_test = np.swapaxes(x_train, 1, 3), np.swapaxes(x_test, 1, 3)
cls.classifier_py.fit(x_train,
y_train,
nb_epochs=2,
batch_size=BATCH_SIZE)
scores = get_labels_np_array(cls.classifier_py.predict(x_train))
acc = np.sum(np.argmax(scores, axis=1) == np.argmax(
y_train, axis=1)) / y_train.shape[0]
logger.info('[PyTorch, MNIST] Accuracy on training set: %.2f%%',
(acc * 100))
scores = get_labels_np_array(cls.classifier_py.predict(x_test))
acc = np.sum(np.argmax(scores, axis=1) == np.argmax(
y_test, axis=1)) / y_test.shape[0]
logger.info('[PyTorch, MNIST] Accuracy on test set: %.2f%%',
(acc * 100))
"""
The script demonstrates a simple example of using ART with TensorFlow v1.x. The example train a small model on the MNIST
dataset and creates adversarial examples using the Fast Gradient Sign Method. Here we use the ART classifier to train
the model, it would also be possible to provide a pretrained model to the ART classifier.
The parameters are chosen for reduced computational requirements of the script and not optimised for accuracy.
"""
import numpy as np
from art.attacks.evasion import FastGradientMethod
from art.estimators.classification import TensorFlowV2Classifier
from art.utils import load_mnist
# Step 1: Load the MNIST dataset
(x_train, y_train), (x_test,
y_test), min_pixel_value, max_pixel_value = load_mnist()
# Step 2: Create the model
import tensorflow as tf
from tensorflow.keras import Model
from tensorflow.keras.layers import Dense, Flatten, Conv2D, MaxPool2D
class TensorFlowModel(Model):
"""
Standard TensorFlow model for unit testing.
"""
def __init__(self):
super(TensorFlowModel, self).__init__()
self.conv1 = Conv2D(filters=4, kernel_size=5, activation="relu")
def test_binary_activation_detector(self):
"""
Test the binary activation detector end-to-end.
:return:
"""
# Get MNIST
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:NB_TRAIN], y_train[:NB_TRAIN]
x_test, y_test = x_test[:NB_TEST], y_test[:NB_TEST]
# Keras classifier
classifier = get_image_classifier_kr()
# Generate adversarial samples:
attacker = FastGradientMethod(classifier, eps=0.1)
x_train_adv = attacker.generate(x_train[:NB_TRAIN])
x_test_adv = attacker.generate(x_test[:NB_TRAIN])
# Compile training data for detector:
x_train_detector = np.concatenate((x_train[:NB_TRAIN], x_train_adv),
axis=0)
y_train_detector = np.concatenate(
(np.array([[1, 0]] * NB_TRAIN), np.array([[0, 1]] * NB_TRAIN)),
axis=0)
# Create a simple CNN for the detector
activation_shape = classifier.get_activations(x_test[:1],
0,
batch_size=128).shape[1:]
number_outputs = 2
try:
from keras.optimizers import Adam
optimizer = Adam(lr=0.01)
except ImportError:
from keras.optimizers import adam_v2
optimizer = adam_v2.Adam(lr=0.01)
model = Sequential()
model.add(MaxPooling2D(pool_size=(2, 2), input_shape=activation_shape))
model.add(Flatten())
model.add(Dense(number_outputs, activation="softmax"))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=optimizer,
metrics=["accuracy"])
# Create detector and train it.
# Detector consider activations at layer=0:
detector = BinaryActivationDetector(classifier=classifier,
detector=KerasClassifier(
model=model,
clip_values=(0, 1),
use_logits=False),
layer=0)
detector.fit(x_train_detector,
y_train_detector,
nb_epochs=2,
batch_size=128)
# Apply detector on clean and adversarial test data:
test_detection = np.argmax(detector.predict(x_test), axis=1)
test_adv_detection = np.argmax(detector.predict(x_test_adv), axis=1)
# Assert there is at least one true positive and negative
nb_true_positives = len(np.where(test_adv_detection == 1)[0])
nb_true_negatives = len(np.where(test_detection == 0)[0])
logger.debug("Number of true positives detected: %i",
nb_true_positives)
logger.debug("Number of true negatives detected: %i",
nb_true_negatives)
self.assertGreater(nb_true_positives, 0)
self.assertGreater(nb_true_negatives, 0)
""" The script demonstrates a simple example of using ART with TensorFlow v1.x. The example train a small model on the MNIST dataset and creates adversarial examples using the Fast Gradient Sign Method. Here we use the ART classifier to train the model, it would also be possible to provide a pretrained model to the ART classifier. The parameters are chosen for reduced computational requirements of the script and not optimised for accuracy. """ import tensorflow as tf import numpy as np from art.attacks import FastGradientMethod from art.classifiers import TFClassifier from art.utils import load_mnist # Step 1: Load the MNIST dataset (x_train, y_train), (x_test, y_test), min_pixel_value, max_pixel_value = load_mnist() # Step 2: Create the model input_ph = tf.placeholder(tf.float32, shape=[None, 28, 28, 1]) labels_ph = tf.placeholder(tf.int32, shape=[None, 10]) x = tf.layers.conv2d(input_ph, filters=4, kernel_size=5, activation=tf.nn.relu) x = tf.layers.max_pooling2d(x, 2, 2) x = tf.layers.conv2d(x, filters=10, kernel_size=5, activation=tf.nn.relu) x = tf.layers.max_pooling2d(x, 2, 2) x = tf.layers.flatten(x) x = tf.layers.dense(x, 100, activation=tf.nn.relu) logits = tf.layers.dense(x, 10) loss = tf.reduce_mean(tf.losses.softmax_cross_entropy(logits=logits, onehot_labels=labels_ph)) optimizer = tf.train.GradientDescentOptimizer(learning_rate=0.01) train = optimizer.minimize(loss)
def setUpClass(cls):
master_seed(seed=1234)
(x_train, y_train), (x_test, y_test), min_, max_ = load_mnist()
y_train = np.argmax(y_train, axis=1)
y_test = np.argmax(y_test, axis=1)
zero_or_four = np.logical_or(y_train == 4, y_train == 0)
x_train = x_train[zero_or_four]
y_train = y_train[zero_or_four]
tr_labels = np.zeros((y_train.shape[0], 2))
tr_labels[y_train == 0] = np.array([1, 0])
tr_labels[y_train == 4] = np.array([0, 1])
y_train = tr_labels
zero_or_four = np.logical_or(y_test == 4, y_test == 0)
x_test = x_test[zero_or_four]
y_test = y_test[zero_or_four]
te_labels = np.zeros((y_test.shape[0], 2))
te_labels[y_test == 0] = np.array([1, 0])
te_labels[y_test == 4] = np.array([0, 1])
y_test = te_labels
n_samples_train = x_train.shape[0]
n_features_train = x_train.shape[1] * x_train.shape[2] * x_train.shape[
3]
n_samples_test = x_test.shape[0]
n_features_test = x_test.shape[1] * x_test.shape[2] * x_test.shape[3]
x_train = x_train.reshape(n_samples_train, n_features_train)
x_test = x_test.reshape(n_samples_test, n_features_test)
x_train = x_train[:NB_TRAIN]
y_train = y_train[:NB_TRAIN]
trusted_data = x_test[:NB_TRUSTED]
trusted_labels = y_test[:NB_TRUSTED]
x_test = x_test[NB_TRUSTED:]
y_test = y_test[NB_TRUSTED:]
valid_data = x_test[:NB_VALID]
valid_labels = y_test[:NB_VALID]
x_test = x_test[NB_VALID:]
y_test = y_test[NB_VALID:]
no_defense = ScikitlearnSVC(model=SVC(kernel=kernel, gamma="auto"),
clip_values=(min_, max_))
no_defense.fit(x=x_train, y=y_train)
poison_points = np.random.randint(
no_defense._model.support_vectors_.shape[0], size=NB_POISON)
all_poison_init = np.copy(
no_defense._model.support_vectors_[poison_points])
poison_labels = np.array([1, 1]) - no_defense.predict(all_poison_init)
svm_attack = PoisoningAttackSVM(
classifier=no_defense,
x_train=x_train,
y_train=y_train,
step=0.1,
eps=1.0,
x_val=valid_data,
y_val=valid_labels,
max_iter=200,
)
poisoned_data, _ = svm_attack.poison(all_poison_init, y=poison_labels)
# Stack on poison to data and add provenance of bad actor
all_data = np.vstack([x_train, poisoned_data])
all_labels = np.vstack([y_train, poison_labels])
model = SVC(kernel=kernel, gamma="auto")
cls.mnist = (
(all_data, all_labels),
(x_test, y_test),
(trusted_data, trusted_labels),
(valid_data, valid_labels),
(min_, max_),
)
cls.classifier = SklearnClassifier(model=model,
clip_values=(min_, max_))
cls.classifier.fit(all_data, all_labels)
cls.defense_cal = RONIDefense(
cls.classifier,
all_data,
all_labels,
trusted_data,
trusted_labels,
eps=0.1,
calibrated=True,
)
cls.defence_no_cal = RONIDefense(
cls.classifier,
all_data,
all_labels,
trusted_data,
trusted_labels,
eps=0.1,
calibrated=False,
)
def setUpClass(cls):
# Get MNIST
(_, _), (x_test, y_test), _, _ = load_mnist()
x_test, y_test = x_test[:NB_TEST], y_test[:NB_TEST]
cls.mnist = x_test, y_test
def test_mnist(self):
session = tf.Session()
k.set_session(session)
comp_params = {
"loss": 'categorical_crossentropy',
"optimizer": 'adam',
"metrics": ['accuracy']
}
# get MNIST
batch_size, nb_train, nb_test = 100, 1000, 100
(X_train, Y_train), (X_test, Y_test), _, _ = load_mnist()
X_train, Y_train = X_train[:nb_train], Y_train[:nb_train]
X_test, Y_test = X_test[:nb_test], Y_test[:nb_test]
im_shape = X_train[0].shape
# get classifier
classifier = CNN(im_shape, act="relu")
classifier.compile(comp_params)
classifier.fit(X_train,
Y_train,
epochs=1,
batch_size=batch_size,
verbose=0)
scores = classifier.evaluate(X_train, Y_train)
print("\naccuracy on training set: %.2f%%" % (scores[1] * 100))
scores = classifier.evaluate(X_test, Y_test)
print("\naccuracy on test set: %.2f%%" % (scores[1] * 100))
attack_params = {
"verbose": 0,
"clip_min": 0.,
"clip_max": 1.,
"eps": 1.
}
attack = FastGradientMethod(classifier, session)
X_train_adv = attack.generate(X_train, **attack_params)
X_test_adv = attack.generate(X_test, **attack_params)
self.assertFalse((X_train == X_train_adv).all())
self.assertFalse((X_test == X_test_adv).all())
train_y_pred = get_labels_np_array(classifier.predict(X_train_adv))
test_y_pred = get_labels_np_array(classifier.predict(X_test_adv))
self.assertFalse((Y_train == train_y_pred).all())
self.assertFalse((Y_test == test_y_pred).all())
scores = classifier.evaluate(X_train_adv, Y_train)
print('\naccuracy on adversarial train examples: %.2f%%' %
(scores[1] * 100))
scores = classifier.evaluate(X_test_adv, Y_test)
print('\naccuracy on adversarial test examples: %.2f%%' %
(scores[1] * 100))
# test minimal perturbations
attack_params = {
"verbose": 0,
"clip_min": 0.,
"clip_max": 1.,
"minimal": True,
"eps_step": .1,
"eps_max": 1.
}
X_train_adv_min = attack.generate(X_train, **attack_params)
X_test_adv_min = attack.generate(X_test, **attack_params)
self.assertFalse((X_train_adv_min == X_train_adv).all())
self.assertFalse((X_test_adv_min == X_test_adv).all())
self.assertFalse((X_train == X_train_adv_min).all())
self.assertFalse((X_test == X_test_adv_min).all())
train_y_pred = get_labels_np_array(classifier.predict(X_train_adv_min))
test_y_pred = get_labels_np_array(classifier.predict(X_test_adv_min))
self.assertFalse((Y_train == train_y_pred).all())
self.assertFalse((Y_test == test_y_pred).all())
scores = classifier.evaluate(X_train_adv_min, Y_train)
print(
'\naccuracy on adversarial train examples with minimal perturbation: %.2f%%'
% (scores[1] * 100))
scores = classifier.evaluate(X_test_adv_min, Y_test)
print(
'\naccuracy on adversarial test examples with minimal perturbation: %.2f%%'
% (scores[1] * 100))
def main():
# Read MNIST dataset (x_raw contains the original images):
(x_raw, y_raw), (x_raw_test, y_raw_test), min_, max_ = load_mnist(raw=True)
n_train = np.shape(x_raw)[0]
num_selection = 5000
random_selection_indices = np.random.choice(n_train, num_selection)
x_raw = x_raw[random_selection_indices]
y_raw = y_raw[random_selection_indices]
# Poison training data
perc_poison = 0.33
(is_poison_train, x_poisoned_raw,
y_poisoned_raw) = generate_backdoor(x_raw, y_raw, perc_poison)
x_train, y_train = preprocess(x_poisoned_raw, y_poisoned_raw)
# Add channel axis:
x_train = np.expand_dims(x_train, axis=3)
# Poison test data
(is_poison_test, x_poisoned_raw_test,
y_poisoned_raw_test) = generate_backdoor(x_raw_test, y_raw_test,
perc_poison)
x_test, y_test = preprocess(x_poisoned_raw_test, y_poisoned_raw_test)
# Add channel axis:
x_test = np.expand_dims(x_test, axis=3)
# Shuffle training data so poison is not together
n_train = np.shape(y_train)[0]
shuffled_indices = np.arange(n_train)
np.random.shuffle(shuffled_indices)
x_train = x_train[shuffled_indices]
y_train = y_train[shuffled_indices]
is_poison_train = is_poison_train[shuffled_indices]
# Create Keras convolutional neural network - basic architecture from Keras examples
# Source here: https://github.com/keras-team/keras/blob/master/examples/mnist_cnn.py
model = Sequential()
model.add(
Conv2D(32,
kernel_size=(3, 3),
activation="relu",
input_shape=x_train.shape[1:]))
model.add(Conv2D(64, (3, 3), activation="relu"))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Dropout(0.25))
model.add(Flatten())
model.add(Dense(128, activation="relu"))
model.add(Dropout(0.5))
model.add(Dense(10, activation="softmax"))
model.compile(loss="categorical_crossentropy",
optimizer="adam",
metrics=["accuracy"])
classifier = KerasClassifier(model=model, clip_values=(min_, max_))
classifier.fit(x_train, y_train, nb_epochs=30, batch_size=128)
# Evaluate the classifier on the test set
preds = np.argmax(classifier.predict(x_test), axis=1)
acc = np.sum(preds == np.argmax(y_test, axis=1)) / y_test.shape[0]
print("\nTest accuracy: %.2f%%" % (acc * 100))
# Evaluate the classifier on poisonous data
preds = np.argmax(classifier.predict(x_test[is_poison_test]), axis=1)
acc = np.sum(preds == np.argmax(y_test[is_poison_test],
axis=1)) / y_test[is_poison_test].shape[0]
print(
"\nPoisonous test set accuracy (i.e. effectiveness of poison): %.2f%%"
% (acc * 100))
# Evaluate the classifier on clean data
preds = np.argmax(classifier.predict(x_test[is_poison_test == 0]), axis=1)
acc = np.sum(preds == np.argmax(y_test[
is_poison_test == 0], axis=1)) / y_test[is_poison_test == 0].shape[0]
print("\nClean test set accuracy: %.2f%%" % (acc * 100))
# Calling poisoning defence:
defence = ActivationDefence(classifier, x_train, y_train)
# End-to-end method:
print("------------------- Results using size metric -------------------")
print(defence.get_params())
defence.detect_poison(nb_clusters=2, nb_dims=10, reduce="PCA")
# Evaluate method when ground truth is known:
is_clean = is_poison_train == 0
confusion_matrix = defence.evaluate_defence(is_clean)
print("Evaluation defence results for size-based metric: ")
jsonObject = json.loads(confusion_matrix)
for label in jsonObject:
print(label)
pprint.pprint(jsonObject[label])
# Visualize clusters:
print("Visualize clusters")
sprites_by_class = defence.visualize_clusters(x_train, "mnist_poison_demo")
# Show plots for clusters of class 5
n_class = 5
try:
import matplotlib.pyplot as plt
plt.imshow(sprites_by_class[n_class][0])
plt.title("Class " + str(n_class) + " cluster: 0")
plt.show()
plt.imshow(sprites_by_class[n_class][1])
plt.title("Class " + str(n_class) + " cluster: 1")
plt.show()
except ImportError:
print(
"matplotlib not installed. For this reason, cluster visualization was not displayed"
)
# Try again using distance analysis this time:
print(
"------------------- Results using distance metric -------------------"
)
print(defence.get_params())
defence.detect_poison(nb_clusters=2,
nb_dims=10,
reduce="PCA",
cluster_analysis="distance")
confusion_matrix = defence.evaluate_defence(is_clean)
print("Evaluation defence results for distance-based metric: ")
jsonObject = json.loads(confusion_matrix)
for label in jsonObject:
print(label)
pprint.pprint(jsonObject[label])
# Other ways to invoke the defence:
kwargs = {"nb_clusters": 2, "nb_dims": 10, "reduce": "PCA"}
defence.cluster_activations(**kwargs)
kwargs = {"cluster_analysis": "distance"}
defence.analyze_clusters(**kwargs)
defence.evaluate_defence(is_clean)
kwargs = {"cluster_analysis": "smaller"}
defence.analyze_clusters(**kwargs)
defence.evaluate_defence(is_clean)
print("done :) ")
def test_3_clever_pt(self):
"""
Test with pytorch.
:return:
"""
# Get MNIST
batch_size, nb_train, nb_test = 100, 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
x_train = np.swapaxes(x_train, 1, 3).astype(np.float32)
x_test = np.swapaxes(x_test, 1, 3).astype(np.float32)
# Get the classifier
ptc = self._create_ptclassifier()
ptc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=1)
# Test targeted clever
res0 = clever_t(ptc, x_test[-1], 2, 10, 5, R_L1, norm=1, pool_factor=3)
res1 = clever_t(ptc, x_test[-1], 2, 10, 5, R_L2, norm=2, pool_factor=3)
res2 = clever_t(ptc,
x_test[-1],
2,
10,
5,
R_LI,
norm=np.inf,
pool_factor=3)
logger.info("Targeted PyTorch: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
# Test untargeted clever
res0 = clever_u(ptc,
x_test[-1],
10,
5,
R_L1,
norm=1,
pool_factor=3,
verbose=False)
res1 = clever_u(ptc,
x_test[-1],
10,
5,
R_L2,
norm=2,
pool_factor=3,
verbose=False)
res2 = clever_u(ptc,
x_test[-1],
10,
5,
R_LI,
norm=np.inf,
pool_factor=3,
verbose=False)
logger.info("Untargeted PyTorch: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
def test_clever_kr(self):
"""
Test with keras.
:return:
"""
# Get MNIST
batch_size, nb_train, nb_test = 100, 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
# Get the classifier
krc = self._create_krclassifier()
krc.fit(x_train,
y_train,
batch_size=batch_size,
nb_epochs=1,
verbose=0)
# Test targeted clever
res0 = clever_t(krc, x_test[-1], 2, 10, 5, R_L1, norm=1, pool_factor=3)
res1 = clever_t(krc, x_test[-1], 2, 10, 5, R_L2, norm=2, pool_factor=3)
res2 = clever_t(krc,
x_test[-1],
2,
10,
5,
R_LI,
norm=np.inf,
pool_factor=3)
logger.info("Targeted Keras: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
# Test untargeted clever
res0 = clever_u(krc,
x_test[-1],
10,
5,
R_L1,
norm=1,
pool_factor=3,
verbose=False)
res1 = clever_u(krc,
x_test[-1],
10,
5,
R_L2,
norm=2,
pool_factor=3,
verbose=False)
res2 = clever_u(krc,
x_test[-1],
10,
5,
R_LI,
norm=np.inf,
pool_factor=3,
verbose=False)
logger.info("Untargeted Keras: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
def test_2_clever_tf(self):
"""
Test with TensorFlow.
:return:
"""
# Get MNIST
batch_size, nb_train, nb_test = 100, 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
# Get the classifier
tfc = self._create_tfclassifier()
tfc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=1)
# TODO Need to configure r
# Test targeted clever
res0 = clever_t(tfc, x_test[-1], 2, 10, 5, R_L1, norm=1, pool_factor=3)
res1 = clever_t(tfc, x_test[-1], 2, 10, 5, R_L2, norm=2, pool_factor=3)
res2 = clever_t(tfc,
x_test[-1],
2,
10,
5,
R_LI,
norm=np.inf,
pool_factor=3)
logger.info("Targeted TensorFlow: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
# Test untargeted clever
res0 = clever_u(tfc,
x_test[-1],
10,
5,
R_L1,
norm=1,
pool_factor=3,
verbose=False)
res1 = clever_u(tfc,
x_test[-1],
10,
5,
R_L2,
norm=2,
pool_factor=3,
verbose=False)
res2 = clever_u(tfc,
x_test[-1],
10,
5,
R_LI,
norm=np.inf,
pool_factor=3,
verbose=False)
logger.info("Untargeted TensorFlow: %f %f %f", res0, res1, res2)
self.assertNotEqual(res0, res1)
self.assertNotEqual(res1, res2)
self.assertNotEqual(res2, res0)
def main():
args = parse_option()
print(args)
# check args
if args.loss not in LOSS_NAMES:
raise ValueError('Unsupported loss function type {}'.format(args.loss))
if args.optimizer == 'adam':
optimizer1 = tf.keras.optimizers.Adam(lr=args.lr_1)
elif args.optimizer == 'lars':
from lars_optimizer import LARSOptimizer
# not compatible with tf2
optimizer1 = LARSOptimizer(
args.lr_1,
exclude_from_weight_decay=['batch_normalization', 'bias'])
elif args.optimizer == 'sgd':
optimizer1 = tfa.optimizers.SGDW(learning_rate=args.lr_1,
momentum=0.9,
weight_decay=1e-4)
optimizer2 = tf.keras.optimizers.Adam(lr=args.lr_2)
model_name = '{}_model-bs_{}-lr_{}'.format(args.loss, args.batch_size_1,
args.lr_1)
# 0. Load data
if args.data == 'mnist':
mnist = tf.keras.datasets.mnist
elif args.data == 'fashion_mnist':
mnist = tf.keras.datasets.fashion_mnist
print('Loading {} data...'.format(args.data))
(_, y_train), (_, y_test) = mnist.load_data()
# x_train, x_test = x_train / 255.0, x_test / 255.0
# x_train = x_train.reshape(-1, 28*28).astype(np.float32)
# x_test = x_test.reshape(-1, 28*28).astype(np.float32)
(x_train, _), (x_test, _), _, _ = load_mnist()
# print(x_train[0][0])
print(x_train.shape, x_test.shape)
# simulate low data regime for training
# n_train = x_train.shape[0]
# shuffle_idx = np.arange(n_train)
# np.random.shuffle(shuffle_idx)
# x_train = x_train[shuffle_idx][:args.n_data_train]
# y_train = y_train[shuffle_idx][:args.n_data_train]
# print('Training dataset shapes after slicing:')
print(x_train.shape, y_train.shape)
train_ds = tf.data.Dataset.from_tensor_slices(
(x_train, y_train)).shuffle(5000).batch(args.batch_size_1)
train_ds2 = tf.data.Dataset.from_tensor_slices(
(x_train, y_train)).shuffle(5000).batch(args.batch_size_2)
test_ds = tf.data.Dataset.from_tensor_slices(
(x_test, y_test)).batch(args.batch_size_1)
# 1. Stage 1: train encoder with multiclass N-pair loss
encoder = Encoder(normalize=True, activation=args.activation)
projector = Projector(args.projection_dim,
normalize=True,
activation=args.activation)
if args.loss == 'max_margin':
def loss_func(z, y):
return losses.max_margin_contrastive_loss(z,
y,
margin=args.margin,
metric=args.metric)
elif args.loss == 'npairs':
loss_func = losses.multiclass_npairs_loss
elif args.loss == 'sup_nt_xent':
def loss_func(z, y):
return losses.supervised_nt_xent_loss(
z,
y,
temperature=args.temperature,
base_temperature=args.base_temperature)
elif args.loss.startswith('triplet'):
triplet_kind = args.loss.split('-')[1]
def loss_func(z, y):
return losses.triplet_loss(z,
y,
kind=triplet_kind,
margin=args.margin)
train_loss = tf.keras.metrics.Mean(name='train_loss')
test_loss = tf.keras.metrics.Mean(name='test_loss')
# tf.config.experimental_run_functions_eagerly(True)
@tf.function
# train step for the contrastive loss
def train_step_stage1(x, y):
'''
x: data tensor, shape: (batch_size, data_dim)
y: data labels, shape: (batch_size, )
'''
with tf.GradientTape() as tape:
r = encoder(x, training=True)
z = projector(r, training=True)
# print("z", z, "y", y)
loss = loss_func(z, y)
gradients = tape.gradient(
loss, encoder.trainable_variables + projector.trainable_variables)
optimizer1.apply_gradients(
zip(gradients,
encoder.trainable_variables + projector.trainable_variables))
train_loss(loss)
@tf.function
def test_step_stage1(x, y):
r = encoder(x, training=False)
z = projector(r, training=False)
t_loss = loss_func(z, y)
test_loss(t_loss)
print('Stage 1 training ...')
for epoch in range(args.epoch):
# Reset the metrics at the start of the next epoch
train_loss.reset_states()
test_loss.reset_states()
for x, y in train_ds:
train_step_stage1(x, y)
for x_te, y_te in test_ds:
test_step_stage1(x_te, y_te)
template = 'Epoch {}, Loss: {}, Test Loss: {}'
# print(template.format(epoch + 1,
# train_loss.result(),
# test_loss.result()))
if args.draw_figures:
# projecting data with the trained encoder, projector
x_tr_proj = projector(encoder(x_train))
x_te_proj = projector(encoder(x_test))
# convert tensor to np.array
x_tr_proj = x_tr_proj.numpy()
x_te_proj = x_te_proj.numpy()
print(x_tr_proj.shape, x_te_proj.shape)
# check learned embedding using PCA
pca = PCA(n_components=2)
pca.fit(x_tr_proj)
x_te_proj_pca = pca.transform(x_te_proj)
x_te_proj_pca_df = pd.DataFrame(x_te_proj_pca, columns=['PC1', 'PC2'])
x_te_proj_pca_df['label'] = y_test
# PCA scatter plot
fig, ax = plt.subplots()
ax = sns.scatterplot('PC1',
'PC2',
data=x_te_proj_pca_df,
palette='tab10',
hue='label',
linewidth=0,
alpha=0.6,
ax=ax)
box = ax.get_position()
ax.set_position([box.x0, box.y0, box.width * 0.8, box.height])
ax.legend(loc='center left', bbox_to_anchor=(1, 0.5))
title = 'Data: {}\nEmbedding: {}\nbatch size: {}; LR: {}'.format(
args.data, LOSS_NAMES[args.loss], args.batch_size_1, args.lr_1)
ax.set_title(title)
fig.savefig('figs/PCA_plot_{}_{}_embed.png'.format(
args.data, model_name))
# density plot for PCA
g = sns.jointplot('PC1', 'PC2', data=x_te_proj_pca_df, kind="hex")
plt.subplots_adjust(top=0.95)
g.fig.suptitle(title)
g.savefig('figs/Joint_PCA_plot_{}_{}_embed.png'.format(
args.data, model_name))
# Stage 2: freeze the learned representations and then learn a classifier
# on a linear layer using a softmax loss
softmax = SoftmaxPred()
train_loss = tf.keras.metrics.Mean(name='train_loss')
train_acc = tf.keras.metrics.SparseCategoricalAccuracy(name='train_ACC')
test_loss = tf.keras.metrics.Mean(name='test_loss')
test_acc = tf.keras.metrics.SparseCategoricalAccuracy(name='test_ACC')
cce_loss_obj = tf.keras.losses.SparseCategoricalCrossentropy(
from_logits=True)
@tf.function
# train step for the 2nd stage
def train_step(model, x, y):
'''
x: data tensor, shape: (batch_size, data_dim)
y: data labels, shape: (batch_size, )
'''
with tf.GradientTape() as tape:
r = model.layers[0](x, training=False)
y_preds = model.layers[1](r, training=True)
loss = cce_loss_obj(y, y_preds)
# freeze the encoder, only train the softmax layer
gradients = tape.gradient(loss, model.layers[1].trainable_variables)
optimizer2.apply_gradients(
zip(gradients, model.layers[1].trainable_variables))
train_loss(loss)
train_acc(y, y_preds)
@tf.function
def test_step(x, y):
r = encoder(x, training=False)
y_preds = softmax(r, training=False)
t_loss = cce_loss_obj(y, y_preds)
test_loss(t_loss)
test_acc(y, y_preds)
if args.write_summary:
current_time = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
train_log_dir = 'logs/{}/{}/{}/train'.format(model_name, args.data,
current_time)
test_log_dir = 'logs/{}/{}/{}/test'.format(model_name, args.data,
current_time)
train_summary_writer = tf.summary.create_file_writer(train_log_dir)
test_summary_writer = tf.summary.create_file_writer(test_log_dir)
print('Stage 2 training ...')
model = tf.keras.Sequential([encoder, softmax])
loss_object = tf.keras.losses.SparseCategoricalCrossentropy(
from_logits=True)
classifier = TensorFlowV2Classifier(
model=model,
loss_object=loss_object,
train_step=train_step,
nb_classes=10,
input_shape=(28, 28, 1),
clip_values=(0, 1),
)
# classifier.fit(x_train, y_train, batch_size=256, nb_epochs=20)
for epoch in range(args.epoch):
# Reset the metrics at the start of the next epoch
train_loss.reset_states()
train_acc.reset_states()
test_loss.reset_states()
test_acc.reset_states()
for x, y in train_ds2:
train_step(model, x, y)
if args.write_summary:
with train_summary_writer.as_default():
tf.summary.scalar('loss', train_loss.result(), step=epoch)
tf.summary.scalar('accuracy', train_acc.result(), step=epoch)
for x_te, y_te in test_ds:
test_step(x_te, y_te)
if args.write_summary:
with test_summary_writer.as_default():
tf.summary.scalar('loss', test_loss.result(), step=epoch)
tf.summary.scalar('accuracy', test_acc.result(), step=epoch)
template = 'Epoch {}, Loss: {}, Acc: {}, Test Loss: {}, Test Acc: {}'
print(
template.format(epoch + 1, train_loss.result(),
train_acc.result() * 100, test_loss.result(),
test_acc.result() * 100))
predictions = classifier.predict(x_test)
print(predictions.shape, y_test.shape)
accuracy = np.sum(np.argmax(predictions, axis=1) == y_test) / len(y_test)
print("Accuracy on benign test examples: {}%".format(accuracy * 100))
print('Stage 3 attacking ...')
attack = ProjectedGradientDescent(estimator=classifier,
eps=args.eps,
eps_step=args.eps / 3,
max_iter=20)
x_test_adv = attack.generate(x=x_test)
print('Stage 4 attacking ...')
predictions = classifier.predict(x_test_adv)
accuracy = np.sum(np.argmax(predictions, axis=1) == y_test) / len(y_test)
print("Accuracy on adversarial test examples: {}%".format(accuracy * 100))
natual(args.eps)
def natual(eps):
# Step 1: Load the MNIST dataset
(x_train,
y_train), (x_test,
y_test), min_pixel_value, max_pixel_value = load_mnist()
# Step 2: Create the model
import tensorflow as tf
from tensorflow.keras import Model
from tensorflow.keras.layers import Dense, Flatten, Conv2D, MaxPool2D
class TensorFlowModel(Model):
"""
Standard TensorFlow model for unit testing.
"""
def __init__(self):
super(TensorFlowModel, self).__init__()
self.conv1 = Conv2D(filters=4, kernel_size=5, activation="relu")
self.conv2 = Conv2D(filters=10, kernel_size=5, activation="relu")
self.maxpool = MaxPool2D(pool_size=(2, 2),
strides=(2, 2),
padding="valid",
data_format=None)
self.flatten = Flatten()
self.dense1 = Dense(100, activation="relu")
self.logits = Dense(10, activation="linear")
def call(self, x):
"""
Call function to evaluate the model.
:param x: Input to the model
:return: Prediction of the model
"""
x = self.conv1(x)
x = self.maxpool(x)
x = self.conv2(x)
x = self.maxpool(x)
x = self.flatten(x)
x = self.dense1(x)
x = self.logits(x)
return x
optimizer = tf.keras.optimizers.Adam(learning_rate=0.01)
def train_step(model, images, labels):
with tf.GradientTape() as tape:
predictions = model(images, training=True)
loss = loss_object(labels, predictions)
gradients = tape.gradient(loss, model.trainable_variables)
optimizer.apply_gradients(zip(gradients, model.trainable_variables))
model = TensorFlowModel()
loss_object = tf.keras.losses.CategoricalCrossentropy(from_logits=True)
# Step 3: Create the ART classifier
classifier = TensorFlowV2Classifier(
model=model,
loss_object=loss_object,
train_step=train_step,
nb_classes=10,
input_shape=(28, 28, 1),
clip_values=(0, 1),
)
# Step 4: Train the ART classifier
classifier.fit(x_train, y_train, batch_size=64, nb_epochs=10)
# Step 5: Evaluate the ART classifier on benign test examples
predictions = classifier.predict(x_test)
accuracy = np.sum(
np.argmax(predictions, axis=1) == np.argmax(y_test, axis=1)) / len(
y_test)
print("Accuracy on benign test examples: {}%".format(accuracy * 100))
# Step 6: Generate adversarial test examples
attack = ProjectedGradientDescent(estimator=classifier,
eps=eps,
eps_step=eps / 3,
max_iter=20)
x_test_adv = attack.generate(x=x_test)
# Step 7: Evaluate the ART classifier on adversarial test examples
predictions = classifier.predict(x_test_adv)
accuracy = np.sum(
np.argmax(predictions, axis=1) == np.argmax(y_test, axis=1)) / len(
y_test)
print("Accuracy on adversarial test examples: {}%".format(accuracy * 100))
def test_tfclassifier(self):
"""
First test with the TFClassifier.
:return:
"""
# Build a TFClassifier
# Define input and output placeholders
self._input_ph = tf.placeholder(tf.float32, shape=[None, 28, 28, 1])
self._output_ph = tf.placeholder(tf.int32, shape=[None, 10])
# Define the tensorflow graph
conv = tf.layers.conv2d(self._input_ph, 4, 5, activation=tf.nn.relu)
conv = tf.layers.max_pooling2d(conv, 2, 2)
fc = tf.contrib.layers.flatten(conv)
# Logits layer
self._logits = tf.layers.dense(fc, 10)
# Train operator
self._loss = tf.reduce_mean(
tf.losses.softmax_cross_entropy(logits=self._logits,
onehot_labels=self._output_ph))
optimizer = tf.train.AdamOptimizer(learning_rate=0.01)
self._train = optimizer.minimize(self._loss)
# Tensorflow session and initialization
self._sess = tf.Session()
self._sess.run(tf.global_variables_initializer())
# Get MNIST
batch_size, nb_train, nb_test = 100, 5000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
# Train the classifier
tfc = TFClassifier((0, 1), self._input_ph, self._logits,
self._output_ph, self._train, self._loss, None,
self._sess)
tfc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=10)
# First attack
cl2m = CarliniL2Method(classifier=tfc,
targeted=True,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, tfc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
#print(x_test_adv)
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(tfc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % target)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(target == y_pred_adv) / float(len(target))))
self.assertTrue((target == y_pred_adv).any())
# Second attack
cl2m = CarliniL2Method(classifier=tfc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, tfc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(tfc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % target)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(target != y_pred_adv) / float(len(target))))
self.assertTrue((target != y_pred_adv).any())
# Third attack
cl2m = CarliniL2Method(classifier=tfc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
y_pred = np.argmax(tfc.predict(x_test), axis=1)
y_pred_adv = np.argmax(tfc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % y_pred)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(y_pred != y_pred_adv) / float(len(y_pred))))
self.assertTrue((y_pred != y_pred_adv).any())
targets=targets
) #this works
# model = GenerateModel(backdoor_type="pattern", model_name=model_name, train=train)
print(model_name)
# model_layer_dict1 = init_coverage_tables(model)
model_layer_times1 = init_coverage_times(model) # times of each neuron covered
model_layer_times2 = init_coverage_times(model) # update when new image and adversarial images found
model_layer_value1 = init_coverage_value(model)
img_dir = './seeds'
img_paths = os.listdir(img_dir)
img_num = len(img_paths)
(x_raw, y_raw), (x_raw_test, y_raw_test), min_, max_ = load_mnist(raw=True)
# Poison training data
perc_poison = .33
(is_poison_train, x_poisoned_raw, y_poisoned_raw) = generate_backdoor(x_raw, y_raw, perc_poison, backdoor_type=backdoor_type)
difference_activation_block2_conv1 = []
difference_activation_block1_conv1 = []
if neuron_select_strategy == '[4]':
x_raw_test = x_raw_test.reshape(x_raw_test.shape[0], 28, 28, 1)
x_poisoned_raw = x_poisoned_raw.reshape(x_poisoned_raw.shape[0], 28, 28, 1)
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
activations_clean_test = get_activations(model, x_raw_test, "block2_conv1")
activation_rate_clean_test = np.mean(activations_clean_test['block2_conv1/Relu:0'] != 0, axis=(0, 3))
activations_poisoned_train = get_activations(model, x_poisoned_raw, "block2_conv1")
def test_krclassifier(self):
"""
Second test with the KerasClassifier.
:return:
"""
# Initialize a tf session
session = tf.Session()
k.set_session(session)
# Get MNIST
batch_size, nb_train, nb_test = 100, 5000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
# Create simple CNN
model = Sequential()
model.add(
Conv2D(4,
kernel_size=(5, 5),
activation='relu',
input_shape=(28, 28, 1)))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Flatten())
model.add(Dense(10, activation='softmax'))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=keras.optimizers.Adam(lr=0.01),
metrics=['accuracy'])
# Get classifier
krc = KerasClassifier((0, 1), model, use_logits=False)
krc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=10)
# First attack
cl2m = CarliniL2Method(classifier=krc,
targeted=True,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, krc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(krc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % target)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(target == y_pred_adv) / float(len(target))))
self.assertTrue((target == y_pred_adv).any())
# Second attack
cl2m = CarliniL2Method(classifier=krc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, krc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(krc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % target)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(target != y_pred_adv) / float(len(target))))
self.assertTrue((target != y_pred_adv).any())
# Third attack
cl2m = CarliniL2Method(classifier=krc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
y_pred = np.argmax(krc.predict(x_test), axis=1)
y_pred_adv = np.argmax(krc.predict(x_test_adv), axis=1)
print("CW2 Target: %s" % y_pred)
print("CW2 Actual: %s" % y_pred_adv)
print("CW2 Success Rate: %f" %
(sum(y_pred != y_pred_adv) / float(len(y_pred))))
self.assertTrue((y_pred != y_pred_adv).any())
model.add(Dense(10, activation="softmax"))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=keras.optimizers.Adam(lr=0.01),
metrics=["accuracy"])
classifier = KerasClassifier(model=model, clip_values=(0, 1))
return classifier
# Get session
session = tf.Session()
k.set_session(session)
# Read MNIST dataset
(x_train, y_train), (x_test, y_test), min_, max_ = load_mnist()
# Construct and train a convolutional neural network on MNIST using Keras
source = cnn_mnist_k(x_train.shape[1:])
source.fit(x_train, y_train, nb_epochs=5, batch_size=128)
# Craft adversarial samples with DeepFool
adv_crafter = DeepFool(source)
x_train_adv = adv_crafter.generate(x_train)
x_test_adv = adv_crafter.generate(x_test)
# Construct and train a convolutional neural network
target = cnn_mnist_tf(x_train.shape[1:])
target.fit(x_train, y_train, nb_epochs=5, batch_size=128)
# Evaluate the CNN on the adversarial samples
def test_ptclassifier(self):
"""
Third test with the PyTorchClassifier.
:return:
"""
# Get MNIST
batch_size, nb_train, nb_test = 100, 5000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:nb_train], y_train[:nb_train]
x_test, y_test = x_test[:nb_test], y_test[:nb_test]
x_train = np.swapaxes(x_train, 1, 3)
x_test = np.swapaxes(x_test, 1, 3)
# Create simple CNN
# Define the network
model = Model()
# Define a loss function and optimizer
loss_fn = nn.CrossEntropyLoss()
optimizer = optim.Adam(model.parameters(), lr=0.01)
# Get classifier
ptc = PyTorchClassifier((0, 1), model, loss_fn, optimizer, (1, 28, 28),
10)
ptc.fit(x_train, y_train, batch_size=batch_size, nb_epochs=10)
# First attack
cl2m = CarliniL2Method(classifier=ptc,
targeted=True,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, ptc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(ptc.predict(x_test_adv), axis=1)
self.assertTrue((target == y_pred_adv).any())
# Second attack
cl2m = CarliniL2Method(classifier=ptc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {'y': random_targets(y_test, ptc.nb_classes)}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
target = np.argmax(params['y'], axis=1)
y_pred_adv = np.argmax(ptc.predict(x_test_adv), axis=1)
self.assertTrue((target != y_pred_adv).any())
# Third attack
cl2m = CarliniL2Method(classifier=ptc,
targeted=False,
max_iter=100,
binary_search_steps=1,
learning_rate=1,
initial_const=10,
decay=0)
params = {}
x_test_adv = cl2m.generate(x_test, **params)
self.assertFalse((x_test == x_test_adv).all())
self.assertTrue((x_test_adv <= 1.0001).all())
self.assertTrue((x_test_adv >= -0.0001).all())
y_pred = np.argmax(ptc.predict(x_test), axis=1)
y_pred_adv = np.argmax(ptc.predict(x_test_adv), axis=1)
self.assertTrue((y_pred != y_pred_adv).any())
def setUpClass(cls):
master_seed(301)
(x_train, y_train), (x_test, y_test), min_, max_ = load_mnist()
y_train = np.argmax(y_train, axis=1)
y_test = np.argmax(y_test, axis=1)
zero_or_four = np.logical_or(y_train == 4, y_train == 0)
x_train = x_train[zero_or_four]
y_train = y_train[zero_or_four]
tr_labels = np.zeros((y_train.shape[0], 2))
tr_labels[y_train == 0] = np.array([1, 0])
tr_labels[y_train == 4] = np.array([0, 1])
y_train = tr_labels
zero_or_four = np.logical_or(y_test == 4, y_test == 0)
x_test = x_test[zero_or_four]
y_test = y_test[zero_or_four]
te_labels = np.zeros((y_test.shape[0], 2))
te_labels[y_test == 0] = np.array([1, 0])
te_labels[y_test == 4] = np.array([0, 1])
y_test = te_labels
n_samples_train = x_train.shape[0]
n_features_train = x_train.shape[1] * x_train.shape[2] * x_train.shape[3]
n_samples_test = x_test.shape[0]
n_features_test = x_test.shape[1] * x_test.shape[2] * x_test.shape[3]
x_train = x_train.reshape(n_samples_train, n_features_train)
x_test = x_test.reshape(n_samples_test, n_features_test)
x_train = x_train[:NB_TRAIN]
y_train = y_train[:NB_TRAIN]
trusted_data = x_test[:NB_TRUSTED]
trusted_labels = y_test[:NB_TRUSTED]
x_test = x_test[NB_TRUSTED:]
y_test = y_test[NB_TRUSTED:]
valid_data = x_test[:NB_VALID]
valid_labels = y_test[:NB_VALID]
x_test = x_test[NB_VALID:]
y_test = y_test[NB_VALID:]
clean_prov = np.random.randint(NB_DEVICES - 1, size=x_train.shape[0])
p_train = np.eye(NB_DEVICES)[clean_prov]
no_defense = ScikitlearnSVC(model=SVC(kernel=kernel), clip_values=(min_, max_))
no_defense.fit(x=x_train, y=y_train)
poison_points = np.random.randint(no_defense._model.support_vectors_.shape[0], size=NB_POISON)
all_poison_init = np.copy(no_defense._model.support_vectors_[poison_points])
poison_labels = np.array([1, 1]) - no_defense.predict(all_poison_init)
svm_attack = PoisoningAttackSVM(classifier=no_defense, x_train=x_train, y_train=y_train,
step=0.1, eps=1.0, x_val=valid_data, y_val=valid_labels, max_iters=200)
poisoned_data = svm_attack.generate(all_poison_init, y=poison_labels)
# Stack on poison to data and add provenance of bad actor
all_data = np.vstack([x_train, poisoned_data])
all_labels = np.vstack([y_train, poison_labels])
poison_prov = np.zeros((NB_POISON, NB_DEVICES))
poison_prov[:, NB_DEVICES - 1] = 1
all_p = np.vstack([p_train, poison_prov])
model = SVC(kernel=kernel)
cls.mnist = (all_data, all_labels, all_p), (x_test, y_test), (trusted_data, trusted_labels), \
(valid_data, valid_labels), (min_, max_)
cls.classifier = SklearnClassifier(model=model, clip_values=(min_, max_))
cls.classifier.fit(all_data, all_labels)
cls.defence_trust = ProvenanceDefense(cls.classifier, all_data, all_labels, all_p,
x_val=trusted_data, y_val=trusted_labels, eps=0.1)
cls.defence_no_trust = ProvenanceDefense(cls.classifier, all_data, all_labels, all_p, eps=0.1)
def main():
try:
print('See if poison model has been previously trained ')
import pickle
classifier = pickle.load(open('my_poison_classifier.p', 'rb'))
print('Loaded model from pickle.... ')
data_train = np.load('data_training.npz')
x_train = data_train['x_train']
y_train = data_train['y_train']
is_poison_train = data_train['is_poison_train']
data_test = np.load('data_testing.npz')
x_test = data_test['x_test']
y_test = data_test['y_test']
is_poison_test = data_test['is_poison_test']
except:
# Read MNIST dataset (x_raw contains the original images):
(x_raw, y_raw), (x_raw_test, y_raw_test), min_, max_ = load_mnist(raw=True)
n_train = np.shape(x_raw)[0]
num_selection = n_train
random_selection_indices = np.random.choice(n_train, num_selection)
x_raw = x_raw[random_selection_indices]
y_raw = y_raw[random_selection_indices]
# Poison training data
perc_poison = .33
(is_poison_train, x_poisoned_raw, y_poisoned_raw) = generate_backdoor(x_raw, y_raw, perc_poison)
x_train, y_train = preprocess(x_poisoned_raw, y_poisoned_raw)
# Add channel axis:
x_train = np.expand_dims(x_train, axis=3)
# Poison test data
(is_poison_test, x_poisoned_raw_test, y_poisoned_raw_test) = generate_backdoor(x_raw_test, y_raw_test,
perc_poison)
x_test, y_test = preprocess(x_poisoned_raw_test, y_poisoned_raw_test)
# Add channel axis:
x_test = np.expand_dims(x_test, axis=3)
# Shuffle training data so poison is not together
n_train = np.shape(y_train)[0]
shuffled_indices = np.arange(n_train)
np.random.shuffle(shuffled_indices)
x_train = x_train[shuffled_indices]
y_train = y_train[shuffled_indices]
is_poison_train = is_poison_train[shuffled_indices]
# Save data used for training and testing split:
np.savez('data_training.npz', x_train=x_train, y_train=y_train, is_poison_train=is_poison_train,
x_raw=x_poisoned_raw)
np.savez('data_testing.npz', x_test=x_test, y_test=y_test, is_poison_test=is_poison_test,
x_raw_test=x_poisoned_raw_test)
# Create Keras convolutional neural network - basic architecture from Keras examples
# Source here: https://github.com/keras-team/keras/blob/master/examples/mnist_cnn.py
k.set_learning_phase(1)
model = Sequential()
model.add(Conv2D(32, kernel_size=(3, 3), activation='relu', input_shape=x_train.shape[1:]))
model.add(Conv2D(64, (3, 3), activation='relu'))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Dropout(0.25))
model.add(Flatten())
model.add(Dense(128, activation='relu'))
model.add(Dropout(0.5))
model.add(Dense(10, activation='softmax'))
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
classifier = KerasClassifier((min_, max_), model=model)
classifier.fit(x_train, y_train, nb_epochs=50, batch_size=128)
print('Saving poisoned model: ')
pickle.dump(classifier, open('my_poison_classifier.p', 'wb'))
# Also saving for Anu:
file_name = 'anu_poison_mnist'
model.save(file_name + '.hdf5')
model_json = model.to_json()
with open(file_name + '.json', "w") as json_file:
json_file.write(model_json)
# Evaluate the classifier on the test set
preds = np.argmax(classifier.predict(x_test), axis=1)
acc = np.sum(preds == np.argmax(y_test, axis=1)) / y_test.shape[0]
print("\nTest accuracy: %.2f%%" % (acc * 100))
# Evaluate the classifier on poisonous data
preds = np.argmax(classifier.predict(x_test[is_poison_test]), axis=1)
acc = np.sum(preds == np.argmax(y_test[is_poison_test], axis=1)) / y_test[is_poison_test].shape[0]
print("\nPoisonous test set accuracy (i.e. effectiveness of poison): %.2f%%" % (acc * 100))
# Evaluate the classifier on clean data
preds = np.argmax(classifier.predict(x_test[is_poison_test == 0]), axis=1)
acc = np.sum(preds == np.argmax(y_test[is_poison_test == 0], axis=1)) / y_test[is_poison_test == 0].shape[0]
print("\nClean test set accuracy: %.2f%%" % (acc * 100))
# Calling poisoning defence:
defence = ActivationDefence(classifier, x_train, y_train)
# End-to-end method:
print("------------------- Results using size metric -------------------")
print(defence.get_params())
defence.detect_poison(n_clusters=2, ndims=10, reduce="PCA")
# Now fix the model
x_new, y_fix = correct_poisoned_labels(x_train, y_train, is_poison_train)
improvement = defence.relabel_poison_ground_truth(x_new, y_fix, test_set_split=0.7, tolerable_backdoor=0.001,
max_epochs=5, batch_epochs=10)
# Evaluate the classifier on poisonous data after backdoor fix:
preds = np.argmax(classifier.predict(x_test[is_poison_test]), axis=1)
acc_after = np.sum(preds == np.argmax(y_test[is_poison_test], axis=1)) / y_test[is_poison_test].shape[0]
print("\nPoisonous test set accuracy (i.e. effectiveness of poison) after backdoor fix: %.2f%%" % (acc_after * 100))
print("\n Improvement after training: ", improvement)
print('before: ', acc, ' after: ', acc_after)
print("done :) ")
def test_binary_input_detector(self):
"""
Test the binary input detector end-to-end.
:return:
"""
# Get MNIST
nb_train, nb_test = 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:NB_TRAIN], y_train[:NB_TRAIN]
x_test, y_test = x_test[:NB_TEST], y_test[:NB_TEST]
# Keras classifier
classifier = get_classifier_kr()
# Generate adversarial samples:
attacker = FastGradientMethod(classifier, eps=0.1)
x_train_adv = attacker.generate(x_train[:nb_train])
x_test_adv = attacker.generate(x_test[:nb_test])
# Compile training data for detector:
x_train_detector = np.concatenate((x_train[:nb_train], x_train_adv),
axis=0)
y_train_detector = np.concatenate(
(np.array([[1, 0]] * nb_train), np.array([[0, 1]] * nb_train)),
axis=0)
# Create a simple CNN for the detector
input_shape = x_train.shape[1:]
model = Sequential()
model.add(
Conv2D(4,
kernel_size=(5, 5),
activation='relu',
input_shape=input_shape))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Flatten())
model.add(Dense(2, activation='softmax'))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=keras.optimizers.Adam(lr=0.01),
metrics=['accuracy'])
# Create detector and train it:
detector = BinaryInputDetector(
KerasClassifier(model=model, clip_values=(0, 1), use_logits=False))
detector.fit(x_train_detector,
y_train_detector,
nb_epochs=2,
batch_size=128)
# Apply detector on clean and adversarial test data:
test_detection = np.argmax(detector.predict(x_test), axis=1)
test_adv_detection = np.argmax(detector.predict(x_test_adv), axis=1)
# Assert there is at least one true positive and negative:
nb_true_positives = len(np.where(test_adv_detection == 1)[0])
nb_true_negatives = len(np.where(test_detection == 0)[0])
logger.debug('Number of true positives detected: %i',
nb_true_positives)
logger.debug('Number of true negatives detected: %i',
nb_true_negatives)
self.assertGreater(nb_true_positives, 0)
self.assertGreater(nb_true_negatives, 0)
def main():
# SETTING UP DEFENCE GAN TRAINED MODELS
# * Clone the defence gan gitrepo https://github.com/yogeshbalaji/InvGAN
# * Follow the setup instructions and copy the following:
# * data/ to adversarial-robustness-toolbox/defence_gan/data/
# * output/gans/mnist to adversarial-robustness-toolbox/defence_gan/output/gans/mnist
# * output/gans_inv_nottrain/mnist to adversarial-robustness-toolbox/defence_gan/output/gans_inv_nottrain/mnist
# STEP 0
logging.info("Loading a Dataset")
(_, _), (x_test_original,
y_test_original), min_pixel_value, max_pixel_value = load_mnist()
# TODO remove before PR request
# batch_size = x_test_original.shape[0]
batch_size = 1000
(x_test, y_test) = (x_test_original[:batch_size],
y_test_original[:batch_size])
# STEP 1
logging.info("Creating a TS1 Mnist Classifier")
classifier = create_ts1_art_mnist_classifier(min_pixel_value,
max_pixel_value)
classifier.fit(x_test, y_test, batch_size=batch_size, nb_epochs=3)
# Code to load the original defense_gan paper mnist classifier to reproduce paper results
# classifier_paper = create_defense_gan_paper_mnist_art_classifier()
# STEP 2
logging.info("Evaluate the ART classifier on non adversarial examples")
predictions = classifier.predict(x_test)
accuracy_non_adv = get_accuracy(predictions, y_test)
# STEP 3
logging.info("Generate adversarial examples")
attack = FastGradientMethod(classifier, eps=0.2)
x_test_adv = attack.generate(x=x_test)
# STEP 4
logging.info("Evaluate the classifier on the adversarial examples")
predictions = classifier.predict(x_test_adv)
accuracy_adv = get_accuracy(predictions, y_test)
# STEP 5
logging.info("Create DefenceGAN")
encoder = create_ts1_encoder_model(batch_size)
generator = create_ts1_generator_model(batch_size)
inverse_gan = InverseGAN(sess=generator._sess,
gan=generator,
inverse_gan=encoder)
# defense_gan = DefenseGAN(sess=generator.sess,
# generator=generator)
logging.info("Generating Defended Samples")
x_test_defended = inverse_gan(x_test_adv, maxiter=1)
# STEP 6
logging.info("Evaluate the classifier on the defended examples")
predictions = classifier.predict(x_test_defended)
accuracy_defended = get_accuracy(predictions, y_test)
logger.info(
"Accuracy on non adversarial examples: {}%".format(accuracy_non_adv))
logger.info("Accuracy on adversarial examples: {}%".format(accuracy_adv))
logger.info("Accuracy on defended examples: {}%".format(accuracy_defended))
def setUpClass(cls):
# Get MNIST
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:NB_TRAIN], y_train[:NB_TRAIN]
x_test, y_test = x_test[:NB_TEST], y_test[:NB_TEST]
cls.mnist = (x_train, y_train), (x_test, y_test)
def test_binary_input_detector(self):
"""
Test the binary input detector end-to-end.
:return:
"""
# Initialize a tf session
session = tf.Session()
k.set_session(session)
# Get MNIST
batch_size, nb_train, nb_test = 100, 1000, 10
(x_train, y_train), (x_test, y_test), _, _ = load_mnist()
x_train, y_train = x_train[:NB_TRAIN], y_train[:NB_TRAIN]
x_test, y_test = x_test[:NB_TEST], y_test[:NB_TEST]
input_shape = x_train.shape[1:]
nb_classes = 10
# Create simple CNN
model = Sequential()
model.add(
Conv2D(4,
kernel_size=(5, 5),
activation='relu',
input_shape=input_shape))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Flatten())
model.add(Dense(nb_classes, activation='softmax'))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=keras.optimizers.Adam(lr=0.01),
metrics=['accuracy'])
# Create classifier and train it:
classifier = KerasClassifier((0, 1), model, use_logits=False)
classifier.fit(x_train, y_train, nb_epochs=5, batch_size=128)
# Generate adversarial samples:
attacker = FastGradientMethod(classifier, eps=0.1)
x_train_adv = attacker.generate(x_train[:nb_train])
x_test_adv = attacker.generate(x_test[:nb_test])
# Compile training data for detector:
x_train_detector = np.concatenate((x_train[:nb_train], x_train_adv),
axis=0)
y_train_detector = np.concatenate(
(np.array([[1, 0]] * nb_train), np.array([[0, 1]] * nb_train)),
axis=0)
# Create a simple CNN for the detector.
# Note: we use the same architecture as for the classifier, except for the number of outputs (=2)
model = Sequential()
model.add(
Conv2D(4,
kernel_size=(5, 5),
activation='relu',
input_shape=input_shape))
model.add(MaxPooling2D(pool_size=(2, 2)))
model.add(Flatten())
model.add(Dense(2, activation='softmax'))
model.compile(loss=keras.losses.categorical_crossentropy,
optimizer=keras.optimizers.Adam(lr=0.01),
metrics=['accuracy'])
# Create detector and train it:
detector = BinaryInputDetector(
KerasClassifier((0, 1), model, use_logits=False))
detector.fit(x_train_detector,
y_train_detector,
nb_epochs=2,
batch_size=128)
# Apply detector on clean and adversarial test data:
test_detection = np.argmax(detector(x_test), axis=1)
test_adv_detection = np.argmax(detector(x_test_adv), axis=1)
# Assert there is at least one true positive and negative:
nb_true_positives = len(np.where(test_adv_detection == 1)[0])
nb_true_negatives = len(np.where(test_detection == 0)[0])
self.assertTrue(nb_true_positives > 0)
self.assertTrue(nb_true_negatives > 0)
