%0 Journal Article
%T Universally Composable Security Concurrent Deniable Authentication Based on Witness Indistinguishable<br>基于证人不可区分的通用可复合安全并行可否认认证
%A FENG Tao
%A MA Jian-Feng
%A <br>冯涛
%A 马建峰
%J 软件学报
%D 2007
%I 
%X A new approach and an idea for exploration are presented to the concurrent deniable authentication based on witness-indistinguishable(WI)within the framework of universally composable(UC)security.A definition of an ideal functionality for deniable authentication is formulated.A new deniable authentication protocol is proposed based on two primitives of the verifiably smooth projective Hashing(VSPH)and non-committing encryptions(NCE).This new approach is practically relevant to VSPH based on the Decisional Diffie-Hellman (DDH)assumption and NCE based on the decisional composite residuosity(DCR)assumption.Compared with a timing constraint and public directory model,simulation of the concurrent protocols is not needed to restrict an adversary capability in a common reference string(CRS)model.The protocols are forward deniable and UC security against adaptive adversaries.Unlike previous proposals with the CCA2 public-key cryptosystem or multi-trapdoor commitments paradigm,the new paradigm leads to more efficient protocols.
%K information security
%K concurrent deniable authentication
%K universally composable security
%K witness-indistinguishable
%K verifiably smooth projective Hashing<br>信息安全
%K 并行可否认认证
%K 通用可复合安全
%K 证人不可区分
%K 可验证平滑投影哈希函数
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=B6B5AABD4CD39E37D36D86B9D512CBFF&yid=A732AF04DDA03BB3&vid=13553B2D12F347E8&iid=708DD6B15D2464E8&sid=47BC2B59C2090B24&eid=74D3A5A7A96E9D84&journal_id=1000-9825&journal_name=软件学报&referenced_num=0&reference_num=18