Hextraordinary
1 minute to read
The challenge introduces us to ROXy, a coder that specializes in short cryptic hard to decipher secret codes.
We are given these hexadecimal values and we know that she has done something with them to generate a secret code:
0xc4115 0x4cf8
Actually, the name ROXy is a hint because she is using XOR cipher. If we operate both numbers using XOR, we get the secret code:
$ python3 -q
>>> hex(0xc4115 ^ 0x4cf8)
'0xc0ded'
So the flag is: CTFlearn{0xc0ded}
.