哈尔滨工业大学学报（英文版）2002，Vol.9Issue(2)：145-148,4.
Improvement of M-U-O and K-P-W proxy signature schemes
Improvement of M-U-O and K-P-W proxy signature schemes
摘要
Abstract
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-signatureKey words
nonrepudiable/digital signature/proxy signature/multi-signature分类
信息技术与安全科学引用本文复制引用
..Improvement of M-U-O and K-P-W proxy signature schemes[J].哈尔滨工业大学学报（英文版）,2002,9(2):145-148,4.基金项目
Sponsored by the National Natural Science Foundation of China(Grant No.69772037,60072018). （Grant No.69772037,60072018）
