使用python實現簡單的序列密碼

使用python 實現簡單的序列密碼

#!/usrs/bin/env python
print '\nStream Ciphers:\n'
before = 'One apple a day, keeps the doctor away!'
after = ""
i = 1
for each in before:
    after += chr(ord(each)^(63+i))
    if i == 4:
        i = 1
print 'before: ',before,'\n'
print 'after: ',after,'\n'
revert = ""
i = 1
for each in after:
    revert += chr(ord(each)^(63+i))
    if i == 4:
        i = 1
print 'revert: ',revert,'\n'