#chacha20 CTF challenges

5 CTF challenges using chacha20 from 4 CTFs (2021–2024), 5 with writeups. Mostly Crypto (60%) and Reverse (40%).

Crypto · 3 Reverse · 2

Often combined with

#key-expansion 1 #signal-handler 1 #srand-time 1 #prng-seed 1 #predictable-key 1 #keystream-reuse 1 #xor 1

Challenges

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