Title: A threshold proxy signature scheme based on elliptic curve cryptosystem
Abstract: In a(t,n) threshold proxy signature scheme,any t or more proxy signers from the delegated proxy group are allowed to delegate the original signer to generate a valid proxy signature.It is more feasible in the situation of practical application because some situations of group-oriented application are considered.By far,most threshold proxy signature schemes proposed are based on the discrete logarithm problem.Since elliptic curve cryptosystem has the advantages of shorter key and more rapid speed at the same security level,a threshold proxy signature scheme based on elliptic curves is presented.Its security is based on the elliptic curve discrete logarithm problem.And the actual signers can be identified if it is necessary.Through security analysis the proposed scheme is proved to be capable of withstanding conspiracy attack and forgery attack.Because of the property of the elliptic curve cryptography,this scheme is efficient in terms of computational complexity and communication cost.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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