发明名称 |
Information processing device, information processing method and program storage medium |
摘要 |
<p>In an information processing system and method which enables detection processing of a revoked entity using an enabling key block (EKB), a device or a service provider as a revoked entity is determined on the basis of the enabling key block (EKB) used for key distribution in a tree structure. ID which enables position identification in the hierarchical key distribution tree is stored in a public key certificate and tracing processing using a tag of the enabling key block (EKB) is executed on the basis of the ID acquired from the public key certificate, thus determining whether or not the ID is of a position where EKB processing (decryption) is possible and determining the presence/absence of revocation of an entity corresponding to the ID. <IMAGE></p> |
申请公布号 |
EP1235381(A1) |
申请公布日期 |
2002.08.28 |
申请号 |
EP20010982750 |
申请日期 |
2001.11.09 |
申请人 |
SONY CORPORATION |
发明人 |
ISHIGURO, RYUJI;ASANO, TOMOYUKI |
分类号 |
G06F21/00;G11B20/00;H04L9/08;H04L9/32;(IPC1-7):H04L9/00;G11B20/10;G06F12/14 |
主分类号 |
G06F21/00 |
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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