Tohoku University · Institute for Advanced Liberal Arts Education and Student Support

Research keywordscryptographic protocols・key exchange security・attribute-based aggregate signatures・card-based cryptography・password-protected secret sharing・discrete logarithm hardness・zero-knowledge proofs・NTRUSign security

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• A structural comparison of the computational difficulty of breaking discrete log cryptosystemsKouichi Sakurai, Hiroki Shizuya
• Demonstrating Possession without Revealing Factors and Its ApplicationHiroki SHIZUYA, Kenji KOYAMA, Toshiya ITOH
• Characterization of optimal key set protocolsT Mizuki, H Shizuya, T Nishizeki
• On the classification of knowledge-of-exponent assumptions in cyclic groupsFiras Kraiem, Shuji Isobe, Eisuke Koizumi, Hiroki Shizuya

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