American Journal of Applied Sciences

Group Re-keying Protocol Based on Modular Polynomial Arithmetic Over Galois Field GF(2n)

Sundaram Sudha, Azman Samsudin and Mohammad Ahmad Alia

DOI : 10.3844/ajassp.2009.1714.1717

American Journal of Applied Sciences

Volume 6, Issue 9

Pages 1714-1717

Abstract

Problem statement: In this study we propose a group re-keying protocol based on modular polynomial arithmetic over Galois Field GF(2n). Common secure group communications requires encryption/decryption for group re-keying process, especially when a group member is leaving the group. Approach: This study proposes secret keys multiplication protocol based on modular polynomial arithmetic (SKMP), which eliminates the need for the encryption/decryption during the group re-keying. Results: The implementation based on modular polynomial arithmetic over Galois Field GF(2n) offers fast re-keying process (about 50% faster than Secret Keys Multiplication Protocol (SKM) for 128 bit key) and compact key size representation against other secret keys multiplication protocols. With SKMP group re-keying is handled more efficiently through modular polynomial arithmetic manipulation rather than the expensive encryption/encryption which need to be done on every membership change.

Copyright

© 2009 Sundaram Sudha, Azman Samsudin and Mohammad Ahmad Alia. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.