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2020-01-07
Matsunaga, Yusuke, Yoshimura, Masayoshi.  2019.  An Efficient SAT-Attack Algorithm Against Logic Encryption. 2019 IEEE 25th International Symposium on On-Line Testing and Robust System Design (IOLTS). :44-47.

This paper presents a novel efficient SAT-attack algorithm for logic encryption. The existing SAT-attack algorithm can decrypt almost all encrypted circuits proposed so far, however, there are cases that it takes a huge amount of CPU time. This is because the number of clauses being added during the decryption increases drastically in that case. To overcome that problem, a novel algorithm is developed, which considers the equivalence of clauses to be added. Experiments show that the proposed algorithm is much faster than the existing algorithm.