身份基和无证书认证非对称群密钥协商的研究

项目名称： 身份基和无证书认证非对称群密钥协商的研究

项目编号： No.61202465

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 计算机科学学科

项目作者： 张磊

作者单位： 华东师范大学

项目金额： 25万元

中文摘要： 群密钥协商作为安全群通信系统的关键和难点，是面向群组应用中的各种安全机制的基础。非对称群密钥协商解决了传统群密钥协商只允许群内用户的安全通信而不允许群外用户向群内用户发送秘密信息的限制及运行轮数上的瓶颈。 本项目基于申请人COCOON 10、CCS 10、Asiacrypt 11及IEEE Trans. Veh. Technol.等的工作，提出身份基和无证书公钥密码系统中认证非对称群密钥协商的新模型、新协议和新应用。在身份基公钥密码系统中首次提出静态/动态具有完美前向安全性及无密钥托管的认证非对称群密钥协商协议的安全模型，首次将非对称群密钥协商的思想扩展到无证书公钥密码系统定义相关安全模型；研究各模型下单轮认证非对称群密钥协商协议的实现技术，提出强不可伪造批多签名和虚拟生长树的思想；设计身份基和无证书认证非对称群密钥协商协议，并将新协议应用于车载自组织网中车辆的安全通信。

中文关键词： 身份基公钥密码学；无证书公钥密码学；非对称群密钥协商；车载自组织网；

英文摘要： As a key problem of secure group communication systems, group key agreement is the basis of various security mechanisms in group-oriented applications. Asymmetric group key agreement solves the limitation in conventional group key agreement which only allows the secure communications within the group while does not allow outside users to send confidential messages to the users in the group and the bottleneck on the running rounds in conventional group key agreement. This project is based on applicant's work published in COCOON 10, CCS 10, Asiacrypt 11, IEEE Trans Veh. Technol., etc., proposes new models, protocols and applications of authenticated asymmetric group key agreement in identity-based and certificateless public key cryptosystems. We propose formal security modes which capture perfect forward secrecy and key escrow freeness for static/dynamic authenticated asymmetric group key agreement protocols in identity-based public key cryptosystem for the first time, extend the concept of asymmetric group key agreement to certificateless public key cryptosystem and define related security models for the first time; research on new techniques to construct one-round authenticated asymmetric group key agreement protocols, e.g., strong unforgeable batch multi-signature and the idea of virtual growth tree; desi

英文关键词： Identity-Based Public Key Cryptography；Certificateless Public Key Cryptography；Asymmetric Group Key Agreement；Vehicular Ad Hoc Network；