计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (27): 21-23.DOI: 10.3778/j.issn.1002-8331.2008.27.007

• 博士论坛 • 上一篇    下一篇

TTS组密钥协商协议的安全性分析与改进

郭现峰   

  1. 西南民族大学 计算机科学与技术学院,成都 610041
  • 收稿日期:2008-05-19 修回日期:2008-06-16 出版日期:2008-09-21 发布日期:2008-09-21
  • 通讯作者: 郭现峰

Cryptanalysis and improvement of TTS group key agreement protocol

GUO Xian-feng   

  1. College of Computer Science and Technology,Southwest University for Nationalities,Chengdu 610041,China
  • Received:2008-05-19 Revised:2008-06-16 Online:2008-09-21 Published:2008-09-21
  • Contact: GUO Xian-feng

摘要: 针对动态对等通信中的组密钥协商协议进行了分析和研究,指出王志伟等人提出的基于树结构和门限思想的组密钥协商协议(TTS)存在密钥控制和不等献性等缺陷,进而给出了一个改进的方案(I-TTS)。安全性分析表明,I-TTS协议不仅克服了TTS协议中的前向安全性和密钥控制缺陷,还满足等献性。

Abstract: This work investigates the group key agreement protocols,and points out that Wang et al’s key agreement protocol (Tree and Threshold Scheme,TST) is not only non-contributory,but also vulnerable to key control i.e.the sponsor of the key agreement can predetermine the group key.To over come the security flaws,this paper presents an improve scheme (I-TTS).Security analysis indicate that I-TTS scheme is contributory,and no one can predetermine the negotiated group key.Further more,the I-TTS scheme is perfect forward secrecy.