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中国科学院大学学报 ›› 2010, Vol. 27 ›› Issue (4): 547-555.DOI: 10.7523/j.issn.2095-6134.2010.4.017

• 论文 • 上一篇    下一篇

基于口令的高效语义安全群密钥交换协议

潘嘉昕, 马昌社, 王立斌   

  1. 华南师范大学计算机学院,广州 510631
  • 收稿日期:2009-12-21 修回日期:2010-03-15 发布日期:2010-07-15
  • 通讯作者: 王立斌
  • 基金资助:

    国家自然科学基金(60703094)资助 

Efficient and semantically secure password-based group key exchange protocol

PAN Jia-Xin, MA Chang-She, WANG Li-Bin   

  1. School of Computer, South China Normal University, Guangzhou 510631, China
  • Received:2009-12-21 Revised:2010-03-15 Published:2010-07-15

摘要:

现有的基于口令的群密钥交换协议大都借助分组密码算法和Hash函数确保协议的安全性. 本文仅借助Hash函数,构造了一种高效、可证明安全的协议. 该协议在随机预言模型下是语义安全的,并能对抗离线字典攻击. 与相关工作比较,本文设计的协议具有更高的计算效率.

关键词: 基于口令的群密钥交换, 可证明安全, 语义安全, 离线字典攻击, 随机预言模型

Abstract:

Many existing password-based group key exchange protocols use the symmetric ciphers and Hash functions to maintain their security. An efficient and provably secure password-based group key exchange protocol, using only Hash function, is proposed. It is semantically secure against off-line dictionary attacks in the random oracle model and is more efficient than the related works.

Key words: password-based group key exchange, provable security, semantic security, off-line dictionary attack, random oracle model

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