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

作　　者：李继国 曹珍富 张亦辰 

出　　处：《Journal of Harbin Institute of Technology(New Series)》2002年第2期145-148,共4页哈尔滨工业大学学报（英文版）

基　　金：SponsoredbytheNationalNaturalScienceFoundationofChina (GrantNo.69772 0 3 7,60 0 72 0 18)

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.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.

关 键 词：nonrepudiable DIGITAL SIGNATURE PROXY SIGNATURE MULTI-SIGNATURE 

分 类 号：TN918.4[电子电信—通信与信息系统]