Affiliations: Institute of Applied Mathematics, National Chung Hsing University, Taichung 402, Taiwan, ROC | Institute of Computer Science, National Chung Hsing University, Taichung 402, Taiwan, ROC Tel.: +886-(0)4-22858200, Fax: +886-(0)4-22853869, E-mail: renhung@amath.nchu.edu.tw jkjan@cs.nchu.edu.tw
Abstract: In many-to-many group secure communications, group members may broadcast or receive messages during any session. A fast session key distribution scheme is desirable for handling highly changeable message flows among group members. In this paper, we propose a group keying scheme using tree structures for many-to-many group secure communications. The key storage and computational complexity of the proposed scheme are acceptable and practical for real-life applications. Moreover, once keys are distributed, group members will be able to freely communicate with any member in security with no need of a group controller.
Keywords: Key management, symmetric encryption, pseudo random function, many-to-many group communication
