Extended Fault Based Attack Against Discrete Logarithm Based Public Key Cryptosystems

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Executive Summary

Since, Bellcore's researchers proposed fault based attacks, these attacks have become serious threats to the implementation of cryptosystems. Boneh et al. first proposed a fault based attack against the exponentiation algorithm for RSA, and some variants of attack were proposed later. However, the previous variants of similar attack are applicable only to the right-to-left exponentiation algorithm and none of these attacks can be successfully applied to the left-to-right alternative algorithm since 1997. In this paper, the authors focus on cryptosystems operated under prime-order groups and emphasize that an extended fault based attack against implementations using the left-to-right exponentiation algorithm is possible.

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