A New Forward-Secure Authenticated Encryption Scheme with Message Linkages  

作　　者：LI Yanping SI Guangdong WANG Yumin 

机构地区：[1]Key Laboratory of Computer Networks and Information Security, Ministry of Education, Xidian University, Xi＇an 710071, Shaanxi, China [2]College of Mathematics and Information Science, Shaanxi Normal University, Xi＇an 710062, Shaanxi, China

出　　处：《Wuhan University Journal of Natural Sciences》2006年第6期1537-1540,共4页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foun-dation of China (60473072)

摘　　要：Yoon and Yoo recently proposed a robust authenticated encryption scheme and claimed their scheme has the properties of forward secrecy and confidentiality. The current paper, however, points out that Yoon-Yoo＇s scheme also can not provide forward secrecy and confidentiality such that any adversary can easily recover the transferred message. Based on intractability of reversing the one-way hash function and discrete logarithm problem, an improved authenticated encryption scheme with messages linkage is proposed. The above security faults get solved perfectly. The new scheme is proven to satisfy all the basic security requirements of the authenticated encryption scheme. And by the concrete comparison, it has the similar efficiency of the original scheme.Yoon and Yoo recently proposed a robust authenticated encryption scheme and claimed their scheme has the properties of forward secrecy and confidentiality. The current paper, however, points out that Yoon-Yoo＇s scheme also can not provide forward secrecy and confidentiality such that any adversary can easily recover the transferred message. Based on intractability of reversing the one-way hash function and discrete logarithm problem, an improved authenticated encryption scheme with messages linkage is proposed. The above security faults get solved perfectly. The new scheme is proven to satisfy all the basic security requirements of the authenticated encryption scheme. And by the concrete comparison, it has the similar efficiency of the original scheme.

关 键 词：authenticated encryption scheme NON-REPUDIATION forward security 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]