Cryptanalysis of Two Pseudo-attacks from the Same Mathematic Mistake  

作　　者：刘杰 施建俊 李建华 

机构地区：[1]Dept. of Electronic Eng., Shanghai Jiaotong Univ.

出　　处：《Journal of Shanghai Jiaotong university(Science)》2007年第3期394-396,共3页上海交通大学学报（英文版）

摘　　要：Yang and Shieh proposed a timestamp-hased password authentication scheme. Fan and Shen gave differ- ent improvements on it. Wang claimed that Fan＇s improvement is insecure and gave his attack. Yang did the simi- lar things on Shen＇s scheme. This paper gave further cryptanalysis on Wang＇s and Yang＇s attacks and pointed out that both of their attacks are infeasible. Wang and Yang made the same mathematic mistake and their attacks are pseudo.Yang and Shieh proposed a timestamp-based password authentication scheme. Fan and Shen gave different improvements on it. Wang claimed that Fan's improvement is insecure and gave his attack. Yang did the similar things on Shen's scheme. This paper gave further cryptanalysis on Wang's and Yang's attacks and pointed out that both of their attacks are infeasible. Wang and Yang made the same mathematic mistake and their attacks are pseudo.

关 键 词：password authentication CRYPTANALYSIS number theory 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]