Cart (Loading....) | Create Account
Close category search window
 

HySOR: group key management with collusion-scalability tradeoffs using a hybrid structuring of receivers

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Fan, J. ; Coll. of Comput., Georgia Inst. of Technol., Atlanta, GA, USA ; Judge, P. ; Ammar, M.H.

One problem in securing group communication is the scalability of group key management in dynamic multicast sessions. The main challenge arises when a member leaves the multicast session and a rekeying of the group is required to prevent the departing member from accessing the information being multicast after they leave. Recent research developed the logical key hierarchy (LKH) protocol which uses a tree structuring of receivers and requires O(log(n)) rekeying messages when a member leaves. It has also been demonstrated that Ω(log(n)) is the best one can achieve if strict confidentiality and non-collusion are required. While strict non-collusion is required for some highly sensitive data, we argue that some commercial content delivery applications will be extremely cost sensitive and willing to tolerate some small level of collusion. In this paper we consider the question of how one might trade off the message cost of rekeying with some increased vulnerability to collusion. We consider a range of protocols. In one extreme is LKH which is completely immune from collusion. On the other extreme is a protocol based on the linear ordering of receivers (LORE), which requires O(1) messages for rekeying but in which any two receivers can collude. We describe a scheme using a hybrid structuring of receivers (HySOR) which is tunable between the LKH and LORE extremes and by which one can trade off some vulnerability to collusion for a decrease in rekeying message cost. We provide analytical as wen as simulation results to investigate the performance of HySOR and its tunability along the collusion/scalability spectrum.

Published in:

Computer Communications and Networks, 2002. Proceedings. Eleventh International Conference on

Date of Conference:

14-16 Oct. 2002

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.