keys = generate_keys("guogaoyang")

plaintext_list = []

ciphertext_list = []

for i in range(256):

t = [1]

diff = random.randint(1, 63)

for j in range(63):

if j == diff:

t.append(1)

else:

t.append(0)

plaintext_list.append(t)

for plaintext in plaintext_list:

ciphertext_list.append(DES(plaintext, 0, 64, keys))

# Do statistics

count = []

rate = []

for i in range(64):

t = 0

for ciphertext in ciphertext_list:

if ciphertext[i] == '0':

t += 1

count.append(t)

rate.append(t / 256.0)

print count