发明名称 |
Decryption method and apparatus using external device or service and revocation mechanism, and decryption support method and apparatus |
摘要 |
A method of protecting digital contents includes: requesting an external device or service to perform a part of a process of decrypting encrypted contents which correspond to a leaf node among a plurality of leaf nodes in a tree used in a revocation mechanism according to whether the leaf node has been revoked; and decrypting the encrypted contents based on a response to the request. Therefore, even when the data storage capacity of a device is small or the data processing capability thereof is low, the contents encrypted according to a broadcast encryption scheme can be decrypted. |
申请公布号 |
US8335315(B2) |
申请公布日期 |
2012.12.18 |
申请号 |
US20060500965 |
申请日期 |
2006.08.09 |
申请人 |
YOON YOUNG-SUN;SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
YOON YOUNG-SUN |
分类号 |
H04L29/06 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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