发明名称 |
INFORMATION PROCESSING SYSTEM AND METHOD |
摘要 |
An information processing system and method for realizing efficient processing using an enabling key block (EKB) using a categorized tree structure. An EKB composed of encrypting data for encrypting an upper-order key by using a lower-order key on a selection path of a key tree having sub-trees managed by a category entity is created and provided to a device. When a request to create an EKB is made, a structure for creating a route key by itself or a structure for requesting a key distribution center to create a route key is selectively executed. Further a structure for requesting a category entity to create a sub-EKB when the EKB distribution center creates an EKB is provided, and therefore the EKB creation and management are made efficient. |
申请公布号 |
EP1249962(A4) |
申请公布日期 |
2005.02.02 |
申请号 |
EP20010272280 |
申请日期 |
2001.12.21 |
申请人 |
SONY CORPORATION |
发明人 |
ASANO, TOMOYUKI;OSAWA, YOSHITOMO;OISHI, TATEO;ISHIGURO, RYUJI;TAKI, RYUTA |
分类号 |
G06F12/14;G06F21/00;G06F21/10;G06F21/62;G11B20/00;H04L9/08;H04L29/06;H04N7/167 |
主分类号 |
G06F12/14 |
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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