基于身份的密码体制研究

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1、摘要公钥密码学在今天的信息安全领域，特别是在保密通信、数字签名和密钥管理中是必不可少的。PI

2、公钥密码体制的原理和用途做了陈述。本文同时也介绍了PⅪ的定义、组成，对CA和数字证书以及详细的工作过程都有描述。通过介绍椭圆曲线密码体制及基于椭圆曲线的双线性对，相关困难问题和Weil对、Tate对的理论知识，分析了基于身份加密体制的构造框架。最后，利用VC++和PBC加密函数库，实现了一种基于身份的加密方案，该方案用椭圆曲线上的双线性映射构造，其安全性基于双线性的计算Di伍e．Hellman假设和单向的HaSh函数。该方案系统初始化简单、加密和解密效率高，便于实现。关键词：公钥密码PⅪ基于身份的密码学椭圆曲线双线性对ABSTRACTIIltheiIlfomationsecur

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