#known-plaintext CTF challenges

14 CTF challenges using known-plaintext from 14 CTFs (2021–2025), 14 with writeups. Mostly Crypto (86%).

Crypto · 12 Misc · 1 Reverse · 1

Often combined with

#ecb 2 #xor 1 #stream-cipher 1 #seed-bruteforce 1 #lcg-keystream 1 #reversing 1 #xor-rotating-key 1 #rejection-sampling 1 #lfsr 1 #gf2-linear-system 1 #keystream-recovery 1 #keystream-reuse 1 #aes-ctr 1 #block-reordering 1 #des 1

Challenges

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