$ ctf42

#repeating-key CTF challenges

3 CTF challenges using repeating-key from 3 CTFs (2023–2025), 3 with writeups.

Crypto · 3

Often combined with

#xor 3 #bruteforce 1

Challenges

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Challenge CTF Weight Category Has
X_Marked_the_Spot UIUCTF 2024 – Crypto files wu 2
Either_or_Neither_nor RITSEC 2023 – Crypto files wu 1
XOR_101 squ1rrel 2025 24.25 Crypto files wu 1