cryptomedium

Enigma

hackerlab

Task: 100 XOR-encrypted messages with 64-bit key, known plaintext prefix "Hello Alice". Solution: Many-Time Pad attack - recovered key using known plaintext XOR, decrypted all messages to find real flag among 99 fakes.

$ ls tags/ techniques/
xorknown_plaintext_attackstream_ciphermany_time_padkey_reuse
Many-Time Pad AttackKnown Plaintext Attack (KPA)XOR Key Recovery
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