Copyright © 2006 The Institute of Electronics, Information and Communication Engineers
Regular Section -- Letters -- Application Information Security |
Improvement of Authenticated Encryption Schemes with Message Linkages for Message Flows*
1 The authors are with the Department of Management Information System, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402, R.O.C. 003. E-mail: mshwang{at}nchu.edu.tw, 2 The author is with the Department of Information Management, National Taichung Institute of Technology, 129 Sec. 3, San-min Rd., Taichung, Taiwan 404, R.O.C. And also with Institute of Computer Science, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan 402, R.O.C., 3 The author is with the Graduate Institute of Networking and Communication Engineering, Chaoyang University of Technology, 168 Gifeng E. Rd., Wufeng, Taichung County, Taiwan 413, R.O.C.
An authenticated encryption scheme provides a mechanism of signing and encrypting simultaneously, and furthermore, the receiver can verify and decrypt the signature at the same time. Tseng et al. proposed two efficiently authenticated encryption schemes which can check the validity of the sent data before message recovery, but in fact their schemes cannot achieve completely the function. In this article, we point out the flaw and propose an improved scheme of revision.
Key Words: authentication, cryptography, digital signature, encryption
Manuscript received February 2, 2004.
* This research was partially supported by the National Science Council, Taiwan, R.O.C., under contract no.: NSC91-2213-E-324-003.