哈尔滨工业大学学报（英文版）2004，Vol.11Issue(2)：209-213,5.
Convertible Proxy Signcryption Scheme
Convertible Proxy Signcryption Scheme
摘要
Abstract
In 1996, Mambo et al introduced the concept of proxy signature. However, proxy signature can only provide the delegated authenticity and cannot provide confidentiality. Recently, Gamage et al and Chan and Wei proposed different proxy signcryption schemes respectively, which extended the concept of proxy signature.However, only the specified receiver can decrypt and verify the validity of proxy signcryption in their schemes.To protect the receiver' s benefit in case of a later dispute, Wu and Hsu proposed a convertible authenticated encryption scheme, which carn enable the receiver to convert signature into an ordinary one that can be verified by anyone. Based on Wu and Hsu' s scheme and improved Kim' s scheme, we propose a convertible proxy signcryption scheme. The security of the proposed scheme is based on the intractability of reversing the one-way hash function and solving the discrete logarithm problem. The proposed scheme can satisfy all properties of strong proxy signature and withstand the public key substitution attack and does not use secure channel. In addition, the proposed scheme can be extended to convertible threshold proxy signcryption scheme.关键词
proxy signcryption/nonrepudiation/digital signature/proxy signatureKey words
proxy signcryption/nonrepudiation/digital signature/proxy signature分类
信息技术与安全科学引用本文复制引用
李继国,李建中,曹珍富,张亦辰..Convertible Proxy Signcryption Scheme[J].哈尔滨工业大学学报（英文版）,2004,11(2):209-213,5.基金项目
Sponsored by the National Natural Science Foudnation of China (Grant No. 60072018, 60273082 ) and National Outstanding Youth Science Foundation of China ( Grant No. 60225007 ). （Grant No. 60072018, 60273082 ）
