《计算机应用研究》|Application Research of Computers

无证书的完美同时签密研究

Research of certificateless perfect concurrent signcryption

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作者 罗铭,闫其军,邹春华,闻英友
机构 1.南昌大学 软件学院,南昌 330047;2.沈阳市电化教育馆,沈阳 110032;3.东北大学 信息科学与工程学院,沈阳 110004
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文章编号 1001-3695(2011)01-0322-04
DOI 10.3969/j.issn.1001-3695.2011.01.090
摘要 完美同时签名技术是为解决公平交换问题而提出的,但目前几乎所有的公平交换协议都不提供机密性保护或采用的是先签名后加密的方法,而机密性是公平交换协议极为重要的安全需求。针对该问题,结合完美同时签名与签密技术提出了完美同时签密的概念,并提出了无证书的完美同时签密方案以及在随机预言模型下证明了方案的安全性。另外,该方案对交换双方模糊签密数据的产生顺序没有要求。与“先签名后加密”的方案比较,其具有更短的消息长度以及更少的计算开销,使得方案具有广泛的应用前景。
关键词 无证书的;完美同时签名;签密;公平交换
基金项目 国家自然科学基金资助项目(60803131)
本文URL http://www.arocmag.com/article/1001-3695(2011)01-0322-04.html
英文标题 Research of certificateless perfect concurrent signcryption
作者英文名 LUO Ming, YAN Qi-jun, ZOU Chun-hua, WEN Ying-you
机构英文名 1. School of Software, Nanchang University, Nanchang 330047, China; 2. Shenyang Audio-Visual Education House, Shenyang 110032, China; 3. School of Information Science & Engineering, Northeastern University, Shenyang 110004, China
英文摘要 Perfect concurrent signature was introduced as an efficient approach to solving the problem of fair exchange of signatures. Almost all fair exchange e-commerce protocols that have been proposed until now either do not provide message privacy protection or adopt the sign-then-encrypt scheme to provide confidentiality. However, confidentiality is an important requirement of e-commerce protocols. This paper proposed a new concept called perfect concurrent signcryption which combined the concepts of perfect concurrent signature and signcryption together to resolve the confidentiality problem in e-commerce systems. It also proposed a certificateless perfect concurrent signcryption scheme and proved its security in the random oracle model. The scheme published the two ambiguous signcryptions in any order. Compared with the sign-then-encrypt scheme, this scheme enjoys shorter message length and less operation cost, which makes the scheme has wide application prospects.
英文关键词 certificateless; perfect concurrent signature; signcryption; fair exchange
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