Analysis and improvement of a password-based authenticated key exchange protocol

SHU Jian1; XU Chun-xiang1

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Analysis and improvement of a password-based authenticated key exchange protocol

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- Analysis and improvement of a password-based authenticated key exchange protocol
- Vol. 31, Issue 3, Pages: 51-56(2010)
- 作者机构：
  
  1. 电子科技大学计算机科学与工程学院
  2. 江西财经大学电子商务系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN918.2
- Published：2010
- 稿件说明：
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SHU Jian1, XU Chun-xiang1. Analysis and improvement of a password-based authenticated key exchange protocol[J]. 2010, 31(3): 51-56.
DOI：

SHU Jian1, XU Chun-xiang1. Analysis and improvement of a password-based authenticated key exchange protocol[J]. 2010, 31(3): 51-56. DOI：

摘要

对基于口令的标准模型下可证明安全的认证密钥协商协议进行安全分析

指出该协议易受反射攻击。同时给出了一个改进方案

该方案不仅弥补了原方案的缺陷

而且改善了协议的性能。最后

基于DDH假设

在标准模型下证明了协议的安全性。结果表明

改进后的协议还具有完美前向安全特性。

Abstract

The security of a recently proposed password-based authenticated key exchange protocol was analyzed. Al- though it was provably secure in the standard model

it was vulnerable to reflection attacks. A modify scheme was pro- posed

which eliminated the defect of original scheme and improved the efficiency of the protocol. The security of the proposed scheme had been proven in the standard model under DDH assumption. The results show that it provides per- fect forward secrecy.

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