CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Timing Attacks on Implementations of Diffie-Hellman, RSA, DSS, and Other Systems
CRYPTO '96 Proceedings of the 16th Annual International Cryptology Conference on Advances in Cryptology
Differential Fault Analysis of Secret Key Cryptosystems
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
CARDIS '98 Proceedings of the The International Conference on Smart Card Research and Applications
ESORICS '08 Proceedings of the 13th European Symposium on Research in Computer Security: Computer Security
An improved SCARE cryptanalysis against a secret A3/A8 GSM algorithm
ICISS'07 Proceedings of the 3rd international conference on Information systems security
Defeating any secret cryptography with SCARE attacks
LATINCRYPT'10 Proceedings of the First international conference on Progress in cryptology: cryptology and information security in Latin America
ACNS'05 Proceedings of the Third international conference on Applied Cryptography and Network Security
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In this paper, we propose a new technique that uses fault injection to reverse-engineer a private block cipher implemented with an unknown S-box. The private algorithm we wish to retrieve differs from a known algorithm in the choice of the S-Box, which we find using a novel, fault-injecting technique. The main idea is to consider the components of the S-Box as the solutions of a linear boolean system, whose equations stem from the faults injected, using existing fault models. We focus on two well-known block ciphers, DES and AES, and prove it to be feasible to retrieve the the S-Box for both cases. We present the fault models used, the equations extracted from the faults injected, and analyse the final results. Given the detailed analysis, the technique can be applied with ease to most ciphers employing an S-box.