HDCTF_你知道lsb是什么意思吗

题目链接见女朋友那一题

lsb 隐写, 另存为 7z 即可

CRC32 爆破, 这里给出官方脚本

import binascii
def str2num(s):
    return int(s, 16)
dic = '1234567890'
crc = 0x7BA3BB27
for x in dic:
    for a in dic:
        for b in dic:
            for c in dic:
                for d in dic:
                    str = x+a+b+c+d
                    str_crc = binascii.crc32('131'+str+'262')& 0xffffffff
                    #print str_crc
                    if (str_crc==crc):
                        print "crc1:",str

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