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Multi-dimensional Key Assignment for Hierarchical Media Access Control with Collusion Resilience

Authors:
Shoko Imaizumi
Naokazu Aoki
Hiroyuki Kobayashi
Hitoshi Kiya

Keywords: assignment; access control; collusion attack; hash chain; cyclic shift; scalable media.

Abstract:
We propose a multidimensional key assignment scheme using modified hash chains (MHCs) to hierarchically control access to scalable media. By introducing MHCs, the proposed scheme manages one key composed of a single key segment. The single managed key is not distributed to any user, providing security against key leakage. Collusion attacks caused by multiple users to obtain media with higher quality than that allowed by their access rights are prevented with the key assignment order. Our scheme also inhibits the growth of hash calculation. Performance analysis shows the validity of the proposed scheme.

Pages: 77 to 82

Copyright: Copyright (c) IARIA, 2012

Publication date: November 18, 2012

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-231-8

Location: Lisbon, Portugal

Dates: from November 18, 2012 to November 23, 2012