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Improvement of M-U-O and K-P-W proxy signature schemes

LI .、Jiguo、Cao、Zhenfu、Zhang、Yichen

2002哈尔滨工业大学学报：英文版Computer Science被引 26

摘要

The concept of proxy signature introduced by Mambo,Usuda,and Okamoto allows a designated person,called a proxy signer,to sign on behalf of an original signer in 1996.However,most existing proxy signature schemes does not support nonrepudiation.In this paper,we propose two secure nonrepudiable proxy signature schemes,which overcome disadvantages of M-U-O and K-P-W proxy signature schemes,respectively.The schemes proposed can withstand public key substitution attack and forge attack.In addition,our new schemes have some other advantages such as proxy signature key generation and updating using insecure channels.Our approach can also be applied to other ElGamal-like proxy signature schemes.

引用本文（GB/T 7714）