def test_decrypt():
for i in range(5):
priv, pub = paillier.generate_keypair(64)
for j in range(5):
pt = long(random.randint(0, 1000000))
ct = paillier.encrypt(pub, pt)
assert pt == paillier.decrypt(priv, pub, ct)
def test_decrypt():
for i in range(5):
priv, pub = paillier.generate_keypair(64)
for j in range(5):
pt = long(random.randint(0, 1000000))
ct = paillier.encrypt(pub, pt)
assert pt == paillier.decrypt(priv, pub, ct)
def test_e_mul_const():
for i in range(5):
priv, pub = paillier.generate_keypair(128)
for j in range(5):
a = long(random.randint(0, 1000000))
c = paillier.encrypt(pub, a)
for n in range(0, 11):
cs = paillier.e_mul_const(pub, c, n)
s = paillier.decrypt(priv, pub, cs)
assert a * n == s
def test_e_add():
for i in range(5):
priv, pub = paillier.generate_keypair(128)
for j in range(5):
a = long(random.randint(0, 1000000))
b = long(random.randint(0, 1000000))
ca, cb = paillier.encrypt(pub, a), paillier.encrypt(pub, b)
cs = paillier.e_add(pub, ca, cb)
s = paillier.decrypt(priv, pub, cs)
assert a + b == s
def generate_keypair(self):
cs = self.cipher_suite
scheme = cs.scheme
if scheme == "Paillier":
sk, pk = paillier.generate_keypair(cs.modulus_length)
# print(pk.n)
elif scheme == "ElGamal":
sk, pk = elgamal.generate_keys(cs.modulus_length)
# print(pk.p)
return sk, pk
def test_e_mul_const():
for i in range(5):
priv, pub = paillier.generate_keypair(128)
for j in range(5):
a = long(random.randint(0, 1000000))
c = paillier.encrypt(pub, a)
for n in range(0, 11):
cs = paillier.e_mul_const(pub, c, n)
s = paillier.decrypt(priv, pub, cs)
assert a * n == s
def test_e_add():
for i in range(5):
priv, pub = paillier.generate_keypair(128)
for j in range(5):
a = long(random.randint(0, 1000000))
b = long(random.randint(0, 1000000))
ca, cb = paillier.encrypt(pub, a), paillier.encrypt(pub, b)
cs = paillier.e_add(pub, ca, cb)
s = paillier.decrypt(priv, pub, cs)
assert a + b == s
def createPass(user, pa):
username = sha.encrypt(user)
password = sha.encrypt(pa)
priv, pub = pail.generate_keypair(256)
userD = {}
if os.path.isfile('UserDB.pkl'):
with open('UserDB.pkl', 'rb') as fb:
userD = pickle.load(fb)
if 'USER_DICT' in userD:
print("ADDING NEW USER")
userD['USER_DICT'].append({username: (password, priv, pub)})
else:
userD = {'USER_DICT': [{username: (password, priv, pub)}]}
with open('UserDB.pkl', 'wb') as fw:
pickle.dump(userD, fw)
import matplotlib.pyplot as plt
from matplotlib import style
style.use('ggplot')
import numpy as np
import paillier as p
priv, pub = p.generate_keypair(128)
X = np.array([[1, 2], [1.5, 1.8], [5, 8]])
X = np.int_(X)
X = X.tolist()
Y = []
# array = np.arange().reshape(X.shape[0],X.shape[1])
# Y = np.zeros((X.shape[0],X.shape[1]))
# Y.astype(int)
# X = X.astype(int)
# X = np.int_(X)
# print(X.shape)
i = 0
print(X)
for x in X:
x = p.encryptArray(pub, x)
Y.append(x)
i += 1
# print(Y)
i = 0
z = [] # np.zeros((X.shape[0],X.shape[1]))
for y in Y:
y = p.decryptArray(priv, pub, y)
z.append(y)
def test_keys_long():
priv, pub = paillier.generate_keypair(256)
for i in range(5):
assert paillier.invmod(priv.m, pub.n) == priv.l
def central_server_oblivious(x):
"""
:param
x: A 2-D array
each column correspond to the result from one subsystem
:return:
x_mean : 1-D array
the mean value across subsystems
enc_time: float
the average time for each subsystem to encrypt its result
collect_time: float
the time for the central server to compute the average
dec_time: float
the average time for each subsystem to decrypt the average send
back from the central server.
"""
# Get dimension
num_subsys = x.shape[0]
num_feature = x.shape[1]
# cx intermediate encrypted version of x
cx = []
cxn = []
# x_mean : a list, this is the returned value
x_mean = []
x_meann = []
# private key and public key, the private key is a pair of prime numbers, each about 512 bits
sk, pk = paillier.generate_keypair(512)
t0 = time.clock()
for i in range(0, num_subsys):
for j in range(0, num_feature):
if x[i,j] < 0:
x[i,j] = -x[i,j]
cxn.append(paillier.encrypt(pk, x[i,j]))
cx.append(1)
else:
cxn.append(1)
cx.append(paillier.encrypt(pk,x[i,j]))
t1 = time.clock()
enc_time = t1 - t0
# enc_time, encryption time for all sub-system, the final reported time is for each subsystem, i.e. enc_time/num_subsys
t0 = time.clock()
for i in range(0, num_subsys):
for j in range(0, num_feature):
if j == 0:
x_mean.append(cx[i*num_feature+j])
x_meann.append(cxn[i*num_feature+j])
else:
x_mean[i] = paillier.e_add(pk, x_mean[i],cx[i*num_feature+j])
x_meann[i] = paillier.e_add(pk, x_meann[i],cxn[i*num_feature+j])
t1 = time.clock()
collect_time = t1 - t0
# collect_time : time for averaging feature values among users
t0 = time.clock()
x_mean = [paillier.decrypt(sk,pk,x)/num_feature for x in x_mean]
x_meann = [paillier.decrypt(sk,pk,x)/num_feature for x in x_meann]
t1 = time.clock()
dec_time = t1 - t0
# dec_time : decryption time
x_mean = [x_mean[i] - x_meann[i] for i in range(0,len(x_mean))]
return (x_mean, enc_time/num_subsys, collect_time, dec_time)
def key_gen(self, n_length):
self.pk, self.sk = generate_keypair(n_length=n_length)
def test_keys_long():
priv, pub = paillier.generate_keypair(256)
for i in range(5):
assert paillier.invmod(priv.m, pub.n) == priv.l
def generate_keypair(self):
cs = self.cipher_suite
return paillier.generate_keypair(cs.modulus_length)
