[hacker.org] XOR Cipher

XOR Cipher1

_encode = '3d2e212b20226f3c2a2a2b'.decode('hex')

text = ''
for l in _encode:
    m = l.encode('hex')
    m = int(m,16)^79
    text += chr(m)

print text

XOR Cipher2

_encode = '948881859781c4979186898d90c4c68c85878f85808b8b808881c6c4828b96c4908c8d97c4878c858888818a8381'.decode('hex')

for x in range(255):
    text = ''

    for l in _encode:
        m = l.encode('hex')
        m = int(m,16)^x
        if 31<m and m<128:
            text += chr(m)

    if len(text)==len(_encode):
        print text

XOR Cipher3

_encode = '31cf55aa0c91fb6fcb33f34793fe00c72ebc4c88fd57dc6ba71e71b759d83588'.decode('hex')

for x in range(255):
    for y in range(255):
        tmp = x
        text = ''

        for l in _encode:
            m = l.encode('hex')
            m = tmp ^ int(m,16)
            text += chr(m)
            tmp = (tmp+y)%256

        print text

XOR Long Cipher

• 키 길이 4바이트
• 평문 첫 바이트는 키 첫번째 바이트로 암호화되어 있음
• 평문 다섯번째 바이트는 키 첫번째 바이트로 암호화를 얻을 수 있음

_encode = '8776459cf37d459fbb7b5ecfbb7f5fcfb23e478aaa3e4389f378439aa13e4e96a77b5fc1f358439df36a4486a03e4381b63e5580a66c0c8ebd6d5b8aa13e459cf34e4d9fa67f02cf90714288a17f589abf7f5886bc705fcfbc700c96bc6b5ecfb7775f8cbc68499daa3f'.decode('hex')
_list = ''
_key = 'd31e2cef'.decode('hex')

for num in range(len(_encode)/4):
    _list += _encode[4*num+3]

for x in range(255):
    text = ''

    for l in _list:
        m = l.encode('hex')
        m = int(m,16)^x
        if 31<m and m<128 and m!=36 and m!=92 and m!=59:
            text += chr(m)

    if len(text)==len(_list):
        print x
        print text

papua

# 211 T hhay rt seunr uCrlooodo # 30 hcea f eFt rs Paoaannuiv # 44 iirskoobsohoy wia.ntts rse # 239 sp efuy.rinoaesp gui y cr

Feedback Cipher

_encode = '751a6f1d3d5c3241365321016c05620a7e5e34413246660461412e5a2e412c49254a24'.decode('hex')

text = ''

for l in range(len(_encode)-1):
    x = _encode[l].encode('hex')
    y = _encode[l+1].encode('hex')
    m = int(x,16)^int(y,16)
    text += chr(m)

print text

Feedback Cipher 2

_encode = '310a7718781f734c31425e775a314f3b40132c5122720599b2dfb790fd8ff894add2a4bdc5d1a6e987a0ed8eee94adcfbb94ee88f382127819623a404d3f'.decode('hex')


for x in range(255):
    k = (0x3f+x)%0x100
    text = ''
    for l in _encode:
        l = l.encode('hex')
        l = int(l,16)
        m = l ^ k
        k = (l + x) % 0x100
        if 31<m and m<128:
            #print chr(m)
            text += chr(m)

    if len(text)+1==len(_encode):
        print text

base7 convert

a = 28679718602997181072337614380936720482949

def convert(n, base):
    T = "0123456789ABCDEF"
    q, r = divmod(n, base)
    if q == 0:
        return T[r]
    else:
        return convert(q, base) + T[r]

print convert(a, 7)