cryptoeasy

Искусство войны (The Art of War)

hackerlab

Task: System of modular congruences with XOR-encrypted flag. Solution: Apply Chinese Remainder Theorem (CRT) to find the key, then XOR decrypt the ciphertext.

$ ls tags/ techniques/
xor_decryptionnumber_theorycrtchinese_remainder_theoremmodular_arithmeticsun_tzu
Chinese Remainder Theorem (CRT) for solving system of congruencesXOR decryption with recovered keyInteger to bytes conversion
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