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XORception
XORception
- Author: Guhan (DaBot)
This is a cryptography-based CTF using a repeating-key XOR cipher.
The provided ciphertext is:
1
3b3b340317420a301b2b30142d010f
The challenge uses the repeating key:
1
xor
Since XOR is its own inverse, we can decrypt the ciphertext by applying the same key again.
Using CyberChef, first apply From Hex, followed by XOR with:
1
2
3
Key: xor
Key type: UTF-8
Scheme: Standard
The repeating key is applied across the ciphertext:
1
xor xor xor xor xor
This produces the original plaintext:
1
CTF{x0r_iS_fUn}
Flag
CTF{x0r_iS_fUn}