cryptohard
Шайтан-алгоритм (Shaitan Algorithm)
hackerlab
Task: decrypt a flag encrypted with a custom block cipher given a known plaintext-ciphertext pair. Solution: reverse-engineer the cipher structure from a visual diagram (XOR + word permutation, 3 rounds), then use Z3 SAT solver to recover the 128-bit key.
$ ls tags/ techniques/
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