%0 Journal Article
%T Research of certificateless perfect concurrent signcryption<br>无证书的完美同时签密研究*
%A LUO Ming
%A YAN Qi-jun
%A ZOU Chun-hu
%A WEN Ying-you
%A <br>罗铭
%A 闫其军
%A 邹春华
%A 闻英友
%J 计算机应用研究
%D 2011
%I 
%X 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.
%K certificateless
%K perfect concurrent signature
%K signcryption
%K fair exchange<br>无证书的
%K 完美同时签名
%K 签密
%K 公平交换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=1CAA0123365A785EC625FF4E410053D4&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=3224764AEAFCF8C2&eid=86C0C9A759FDA8CA&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=12