Remark on S. Saeednia and H. Ghodosi＇s Group-Oriented Cryptosystem  

作　　者：XU Chunxiang ZHOU Junhui XIAO Guozhen 

机构地区：[1]School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China [2]State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100039, China [3]Information Security and Privacy Institute, Xidian University, Xi＇an 710071, China

出　　处：《Chinese Journal of Electronics》2006年第4期725-726,共2页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.60573129）, and the 0pening Fund of Key Laboratory of Computer Network ＆ Information Security, Ministry of Education of China.

摘　　要：S. Saeednia and H. Ghodosi proposed a self-certified group-oriented cryptosystem that allows the participants to decrypt the ciphertext themselves, and the participants＇ public keys are publicly certifiable. In this paper, a mistake is pointed out in S. Saeednia and H. Ghodosi＇s group-orlented cryptosystem. This mistake causes the cryptosystem to work incorrectly with a probability of 3/4. A modification is proposed to correct the mistake. The characteristics of the cryptosystem are preserved after the modification.

关 键 词：Group-oriented cryptosystems Self- certified public keys Cryptosystems. 

分 类 号：TN918[电子电信—通信与信息系统]