def test_input_types(self):
it_process = build_federated_averaging_process_attacked(_model_fn)
self.assertIsInstance(it_process, tff.templates.IterativeProcess)
federated_data_type = it_process.next.type_signature.parameter[1]
self.assertEqual(str(federated_data_type),
'{<x=float32[?,784],y=int64[?,1]>*}@CLIENTS')
self.assertEqual(str(it_process.next.type_signature.parameter[1]),
str(it_process.next.type_signature.parameter[2]))
federated_bool_type = it_process.next.type_signature.parameter[3]
self.assertEqual(str(federated_bool_type), '{bool}@CLIENTS')
def test_self_contained_example_custom_model(self):
client_data = create_client_data()
batch = client_data()
train_data = [batch]
malicious_data = [batch]
client_type_list = [tf.constant(False)]
trainer = build_federated_averaging_process_attacked(MnistModel)
state = trainer.initialize()
losses = []
for _ in range(2):
state, outputs = trainer.next(state, train_data, malicious_data,
client_type_list)
losses.append(outputs['loss'])
self.assertLess(losses[1], losses[0])
def test_attack(self):
"""Test whether an attacker is doing the right attack."""
self.skipTest('b/150215351 This test became flaky after TF change which '
'removed variable reads from control_outputs.')
client_data = create_client_data()
batch = client_data()
train_data = [batch]
malicious_data = [batch]
client_type_list = [tf.constant(True)]
trainer = build_federated_averaging_process_attacked(
_model_fn,
client_update_tf=attacked_fedavg.ClientExplicitBoosting(
boost_factor=-1.0))
state = trainer.initialize()
initial_weights = state.model.trainable
for _ in range(2):
state, _ = trainer.next(state, train_data, malicious_data,
client_type_list)
self.assertAllClose(initial_weights, state.model.trainable)
def test_dp_fed_mean(self):
"""Test whether the norm clipping is done successfully."""
client_data = create_client_data()
batch = client_data()
train_data = [batch]
malicious_data = [batch]
client_type_list = [tf.constant(False)]
l2_norm = 0.01
query = tensorflow_privacy.GaussianAverageQuery(l2_norm, 0.0, 1.0)
dp_agg_factory = tff.aggregators.DifferentiallyPrivateFactory(query)
aggregation_process = dp_agg_factory.create(
tff.learning.framework.weights_type_from_model(_model_fn).trainable)
trainer = build_federated_averaging_process_attacked(
_model_fn, aggregation_process=aggregation_process)
state = trainer.initialize()
initial_weights = state.model.trainable
state, _ = trainer.next(state, train_data, malicious_data, client_type_list)
weights_delta = tf.nest.map_structure(tf.subtract, state.model.trainable,
initial_weights)
self.assertLess(attacked_fedavg._get_norm(weights_delta), l2_norm * 1.1)
def main(argv):
if len(argv) > 1:
raise app.UsageError('Too many command-line arguments.')
config = tf.compat.v1.ConfigProto()
config.graph_options.rewrite_options.layout_optimizer = 2
tf.compat.v1.enable_eager_execution(config)
np.random.seed(FLAGS.random_seed)
flag_dict = FLAGS.flag_values_dict()
configs = '-'.join([
'{}={}'.format(k, flag_dict[k]) for k in keys if k != 'root_output_dir'
])
file_name = 'log' + configs
create_if_not_exists(FLAGS.root_output_dir)
file_handle = open(os.path.join(FLAGS.root_output_dir, file_name), 'w')
global_step = tf.Variable(1, name='global_step', dtype=tf.int64)
file_writer = tf.summary.create_file_writer(
os.path.join(FLAGS.root_output_dir))
file_writer.set_as_default()
write_print(file_handle, '=======configurations========')
write_print(file_handle, configs)
write_print(file_handle, '=======configurations========')
# prepare dataset.
write_print(file_handle, 'Loading Dataset!')
emnist_train, _ = tff.simulation.datasets.emnist.load_data(
only_digits=FLAGS.only_digits)
# prepare test set
write_print(file_handle, 'Loading Test Set!')
test_image, test_label = load_test_data()
# load malicious dataset
write_print(file_handle, 'Loading malicious dataset!')
dataset_malicious, target_x, target_y = load_malicious_dataset(
FLAGS.task_num)
# prepare model_fn.
example_dataset = preprocess(
emnist_train.create_tf_dataset_for_client(emnist_train.client_ids[0]))
input_spec = example_dataset.element_spec
def model_fn():
keras_model = create_keras_model()
return tff.learning.from_keras_model(
keras_model,
input_spec=input_spec,
loss=tf.keras.losses.SparseCategoricalCrossentropy(),
metrics=[tf.keras.metrics.SparseCategoricalAccuracy()])
# define server optimizer
nesterov = True if FLAGS.server_momentum != 0 else False
def server_optimizer_fn():
return tf.keras.optimizers.SGD(
learning_rate=FLAGS.server_learning_rate,
momentum=FLAGS.server_momentum,
nesterov=nesterov)
# build interative process
write_print(file_handle, 'Building Iterative Process!')
client_update_function = attacked_fedavg.ClientProjectBoost(
boost_factor=float(FLAGS.num_clients_per_round),
norm_bound=FLAGS.norm_bound,
round_num=FLAGS.client_round_num)
query = tensorflow_privacy.GaussianAverageQuery(
FLAGS.l2_norm_clip, FLAGS.mul_factor, FLAGS.num_clients_per_round)
dp_aggregate_fn = tff.utils.build_dp_aggregate_process(
tff.learning.framework.weights_type_from_model(model_fn), query)
iterative_process = attacked_fedavg.build_federated_averaging_process_attacked(
model_fn=model_fn,
aggregation_process=dp_aggregate_fn,
client_update_tf=client_update_function,
server_optimizer_fn=server_optimizer_fn)
state = iterative_process.initialize()
# training loop
for cur_round in range(FLAGS.num_rounds):
if cur_round % FLAGS.attack_freq == FLAGS.attack_freq // 2:
with_attack = 1
write_print(file_handle, 'Attacker appears!')
else:
with_attack = 0
# sample clients and make federated dataset
federated_train_data, federated_malicious_data, client_type_list = \
sample_clients_with_malicious(
emnist_train, client_ids=emnist_train.client_ids,
dataset_malicious=dataset_malicious,
num_clients=FLAGS.num_clients_per_round, with_attack=with_attack)
# one round of attacked federated averaging
write_print(file_handle, 'Round starts!')
state, train_metrics = iterative_process.next(
state, federated_train_data, federated_malicious_data,
client_type_list)
write_print(
file_handle, 'Training round {:2d}, train_metrics={}'.format(
cur_round, train_metrics))
log_tfboard('train_acc', train_metrics['sparse_categorical_accuracy'],
global_step)
log_tfboard('train_loss', train_metrics['loss'], global_step)
# evaluate current model on test data and malicious data
if cur_round % FLAGS.evaluate_per_rounds == 0:
test_metrics, test_metrics_target = evaluate(
state, test_image, test_label, target_x, target_y)
write_print(
file_handle,
'Evaluation round {:2d}, <sparse_categorical_accuracy={},loss={}>'
.format(cur_round, test_metrics[1], test_metrics[0]))
write_print(
file_handle,
'Evaluation round {:2d}, <sparse_categorical_accuracy={},loss={}>'
.format(cur_round, test_metrics_target[1],
test_metrics_target[0]))
log_tfboard('test_acc', test_metrics[1], global_step)
log_tfboard('test_loss', test_metrics[0], global_step)
log_tfboard('test_acc_target', test_metrics_target[1], global_step)
log_tfboard('test_loss_target', test_metrics_target[0],
global_step)
global_step.assign_add(1)
