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A modified method for storage and revoking of the AACS device keys
Received date: 2010-09-20
Revised date: 2010-10-18
Online published: 2011-09-15
The advanced access content system is a standard for content distribution and digital rights management. It revokes compromised devices by revoking their corresponding device keys and manages them by using the subset cover tree method, which needs many device keys for storing each device. On the reasonable assumption that devices are revoked randomly and uniformly, a modified method is proposed for storage and revoking of the keys. Then, the number of the keys decreases greatly, while the number of the subset covers for legal devices only increases slightly.
Key words： AACS; device keys; subset cover tree; DRM
YANG Hui-Hui , ZHAO Xian-Feng . A modified method for storage and revoking of the AACS device keys[J]. Journal of University of Chinese Academy of Sciences, 2011 , 28(5) : 642 -647 . DOI: 10.7523/j.issn.2095-6134.2011.5.012
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