计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (21): 77-78.DOI: 10.3778/j.issn.1002-8331.2009.21.021

• 网络、通信、安全 • 上一篇    下一篇

改进的PMAC及安全性分析

晁仕德1,张绍兰2,田 华3,杨义先4   

  1. 1.青海广播电视大学,西宁 810008
    2.山东建筑大学,济南 250101
    3.石家庄邮电职业技术学院,石家庄 050021
    4.北京邮电大学,北京 100876
  • 收稿日期:2008-04-25 修回日期:2008-07-22 出版日期:2009-07-21 发布日期:2009-07-21
  • 通讯作者: 晁仕德

Improved PMAC and its security analysis

CHAO Shi-de1,ZHANG Shao-lan2,TIAN Hua3,YANG Yi-xian4
  

  1. 1.Qinghai Radio & TV University,Xining 810008,China
    2.Shandong Jianzhu Univerity,Jinan 250101,China
    3.Shijiazhuang Vocational College of Posts and Telecom,Shijiazhuang 050021,China
    4.Beijing University of Posts and Telecommunications,Beijing 100876,China
  • Received:2008-04-25 Revised:2008-07-22 Online:2009-07-21 Published:2009-07-21
  • Contact: CHAO Shi-de

摘要: 针对Lee Changhoon等人对PMAC工作模式提出的伪造攻击,找到PMAC被攻击的弱点。改进了PMAC最后一个消息块的处理方式,避免了利用分组密码在同一个密钥下相同输入有相同输出这一特点进行的伪造攻击,并给出了改进方案的安全性分析。

关键词: 工作模式, 分组密码, 消息认证码, 伪造攻击

Abstract: According to the forgery attack on PMAC proposed by Lee Changhoon et al,the weakness is found.The method to process the last block of message is proposed to avoid the forgery attack by using the fact that the block cipher has same output with the same input using a key.The security of the improved scheme is analysed.

Key words: mode of operation, block cipher, message authentication code, forgery attack