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A Directed Threshold Group Signature Scheme Based on DSA Deformation

Zhonghua Shen

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Abstract

In order to protect the privacy of the signature receiver,directed signature scheme demands that the signature can be verified only with the cooperation of the signature receiver or the signer.Based on the secret sharing scheme of thresshold group signature and the intractability of discrete logarithm,a new directed threshold group signature scheme was proposed.The analysis shows that this scheme is secure.Comparing to other existing directed threshold group schemes,it has certain stability.

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What this paper is about

In order to protect the privacy of the signature receiver,directed signature scheme demands that the signature can be verified only with the cooperation of the signature receiver or the signer.Based on the secret sharing scheme of thresshold group signature and the intractability of discrete logarithm,a new directed threshold group signature scheme was proposed.The analysis shows that this scheme is secure.Comparing to other existing directed threshold group schemes,it has certain stability.

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Available abstract

In order to protect the privacy of the signature receiver,directed signature scheme demands that the signature can be verified only with the cooperation of the signature receiver or the signer.Based on the secret sharing scheme of thresshold group signature and the intractability of discrete logarithm,a new directed threshold group signature scheme was proposed.The analysis shows that this scheme is secure.Comparing to other existing directed threshold group schemes,it has certain stability.

Key concepts: ElGamal signature scheme, Group signature, Ring signature, Schnorr signature, Signature (topology), Merkle signature scheme, Discrete logarithm, Blind signature

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