I was given the following equations. Can you help me decode the flag?
Text moved to XORed.txt.
XORed.txt
XORed.txtにxorされたflagが書かれている。
XORedXOR.pyのように、xorをもう一度行うことで元に戻る性質を利用する。
Key1 = 0x5dcec311ab1a88ff66b69ef46d4aba1aee814fe00a4342055c146533
Key13 = 0x9a13ea39f27a12000e083a860f1bd26e4a126e68965cc48bee3fa11b
Key235 = 0x557ce6335808f3b812ce31c7230ddea9fb32bbaeaf8f0d4a540b4f05
Key145 = 0x7b33428eb14e4b54f2f4a3acaeab1c2733e4ab6bebc68436177128eb
Key34 = 0x996e59a867c171397fc8342b5f9a61d90bda51403ff6326303cb865a
FlagKey12345 = 0x306d34c5b6dda0f53c7a0f5a2ce4596cfea5ecb676169dd7d5931139
Key3 = Key1 ^ Key13
Key4 = Key3 ^ Key34
Key5 = Key1 ^ Key4 ^ Key145
Key2 = Key3 ^ Key5 ^ Key235
Flag = FlagKey12345 ^ Key1 ^ Key2 ^ Key3 ^ Key4 ^ Key5
print(hex(Flag))あとはasciiに変換すればよい。
$ python XORedXOR.py
0x666c61677b6e30745f7430305f683472445f6830703366756c6c797d
$ python2 -c "print('666c61677b6e30745f7430305f683472445f6830703366756c6c797d'.decode('hex'))"
flag{n0t_t00_h4rD_h0p3fully}