轮复杂度最优的群组密钥协商协议及其可证明安全研究

项目名称： 轮复杂度最优的群组密钥协商协议及其可证明安全研究

项目编号： No.61303256

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 自动化技术、计算机技术

项目作者： 滕济凯

作者单位： 青岛理工大学

项目金额： 23万元

中文摘要： 在本项目中,针对群组密钥协商协议中存在的一些关键问题，我们层层递进地做如下几个方面的工作:(1)通过降低群组用户的计算量和通信量来提高协议的效率，设计轮复杂度最优的一轮群组密钥协商协议。研究一轮群组密钥协商协议在多于两个用户被腐化的前提下的抵抗密钥泄漏伪装攻击的能力。(2) 研究一轮非对称群组密钥协商协议的合谋攻击和叛逆追踪问题，并设计具有叛逆追踪性的一轮非对称动态群组密钥协商协议。(3) 将侧信道攻击等安全隐患添加到安全模型中,使得安全模型能够更好地模拟现实中的攻击环境。在一轮协议的基础上设计在提出的模型下安全的协议。(4) 采用已有的轻量级密码方案或者改变传统协议的实现方式,设计在资源受限的无线移动网络环境中适用的轻量级群组密钥协商协议并在安全模型下严格证明它们的安全性。希望通过本项目的研究进一步探索安全高效的群组密钥协商协议的设计方法,为群组密码学的理论研究和实际应用提供强有力支持。

中文关键词： 群组密钥协商协议；安全模型；可证明安全；轻量级协议；合谋攻击

英文摘要： In order to solve some key issues in group key agreement protocols, the proposal plans to gradually study the following issues:(1) Reduce computation and communication cost of group members to improve the efficiency of group key agreement protocols, design round-optimal group key agreement protocols with one round. Research on key compromise impersonation resilience of one-round group key agreement protocols when more than two users are corrupted.(2) Study collusion attack and traitor traceability of one-round asymmetric group key agreement protocols and design one-round asymmetric dynamic group key agreement protocols with traitor traceability. (3) Improve security models to capture more potential risks such as side channel attack such that the security model can better capture the real enviroment.Based on one-round group key agreement protocols, design group key agreement protocols secure under the proposed models. (4)By applying existing light-weight cryptographic schemes or improving the way traditional group key agreement protocols are implemented, design light-weight group key agreement protocols which are suitable in energy-constrained wireless mobile environment and formally analyze their security under security models. We wish that the research in this project will be greatly helpful for the theory

英文关键词： group key agreement protocol；security model；provable security；light-weight protocol；collusion attack