Practical and Proven Zero-Knowledge Constant Round Variants of GQ and Schnorr (Special Section on Cryptography and Information Security)
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概要
- 論文の詳細を見る
In 1992 Burmester studied how to adapt the Guillou-Quisquater identification scheme to a proven zero-knowledge proof without significantly increasing the communication complexity and computational overhead. He proposed an almost constant round version of Guillou-Quisquater. Di Crescenzo and Persiano presentcd a 4-move constant round zero-knowledge interactive proof of membership for the corresponding language. A straightforward adaptation of the ideas of Bellare-Micali-Ostrovsky will also give a constant round protocol. However, these protocols significantly increase the communication and computational complexity of the scheme. In this paper we present constant round variants of the protocols of Guillou-Quisquater and Schnorr with the same (order-wise) communication and computational complexity as the original schemes. Note that in our schemes the probability that a dishonest prover will fool a honest verifier may be exponentially small, while it can only be one over a superpolynomial in Burmester's scheme. Our protocols are perfect zero-knowledge under no cryptographic assumptions.
- 社団法人電子情報通信学会の論文
- 1999-01-25
著者
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Kurosawa Kaoru
Department Of Electrical And Electronic Eng. Tokyo Institute Of Technology
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Kurosawa Kaoru
Department Of Behavioral Sciences Faculty Of Letters Chiba University
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DESMEDT Yvo
EE & CS
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Desmedt Yvo
Ee & Cs:center Of Cryptography Computer And Network Security University Of Wisconsin
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