CTF-JarvisOJ-Basic-德军的密码

已知将一个flag以一种加密形式为使用密钥进行加密，使用密钥WELCOMETOCFF加密后密文为

000000000000000000000000000000000000000000000000000101110000110001000000101000000001 请分析出flag。Flag为12位大写字母

因为WELCOMETOCFF转化为二进制和上述密文长度相同，猜测是异或

Code

import binascii
crypto = '000000000000000000000000000000000000000000000000000000000001011100000110000100000001010000000001'
key     = '010101110100010101001100010000110100111101001101010001010101010001001111010000110100011001000110'
c = ''
str = ''
for i in range(len(crypto)):
	if (key[i] == crypto[i]):
		c+='0'
	else:
		c+='1'
print(c);
for i in range(0,12):
	str += chr(int(c[i*8:i*8+8],2))
print str

执行得到flag
flag{WELCOMECISRG}