Mifare Classic Card Recovery Tool _top_

| Component | Function | |-----------|----------| | Reader Interface | Send raw APDUs; capture encrypted nonces/traces. | | Keystream Extractor | Recover CRYPTO1 keystream from known plaintext (e.g., UID + known key). | | Crypto1 Solver | Reconstruct LFSR state from nonce, encrypted response, and parity bits. | | Nested Attack Engine | Iterate over sectors: recover keys recursively. | | Darkside Attack Engine | Brute-force state space using partial parity leakage. |

The Mifare Classic (1K and 4K) remains one of the most ubiquitous RFID contactless smart cards in the world. Originally marketed as secure, it was historically protected by "security through obscurity." Since the cryptographic cipher (CRYPTO1) was reverse-engineered, the process of "recovery"—extracting data from a card without prior authorization—has become a standardized procedure in security auditing.