收稿日期: 2010-09-20
修回日期: 2010-10-18
网络出版日期: 2011-09-15
基金资助
国家自然科学基金(60633030)资助
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
杨慧慧 , 赵险峰 . AACS设备密钥存储与吊销的改进方案[J]. 中国科学院大学学报, 2011 , 28(5) : 642 -647 . DOI: 10.7523/j.issn.2095-6134.2011.5.012
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
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