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MQ-Sign is a variant of the UOV signature scheme proposed by Shim et al. It has been suggested as a candidate for the standardization of post-quantum cryptography in Republic of Korea (known as KpqC).... Recently Aulbach et al. proposed a practical key recovery attack against MQ-Sign-RS and MQ-Sign-SS with a simple secret key S. In this paper, we propose another attack that is valid for the case of a general secret key S.続きを見る
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