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Information Processing System And Method Using Encryption Key Block
Abstract: An information processing system and method using an encryption key block sets sub-trees classified based on data processing ability of the devices (capability)in a key tree in which respective keys are corresponded to a root,nodes and leaves of a tree in which a plurality of devices are constituted as the leaves,generates a sub-enabling key block which is effective for an entity in a managing subject of each sub-tree (entity), and generates an enabling key block decodable only by the entities having common capability. Also,an information processing system and method using an encryption key block manages a partial tree of a key tree (sub-tree), generates a sub-enabling key block based only on a key set corresponding to nodes or leaves included in the sub-tree, and generates an enabling key block decodable only by selected entities by using the sub-enabling key block. Thus, it is possible to generate and distribute an enabling key block corresponding to data processing ability of a device and to manage devices by dividing a hierarchical key tree structure.
Notices, Deadlines & Correspondence
Patent Information
Applicants
SONY CORPORATION
Inventors
1. YOSHIMICHI KITAYA
2. RYUJI ISHIGURO
3. YOSHITOMO OSAWA
4. TOMOYUKI ASANO
Specification
N/A
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | IN-PCT-2002-00136-MUM-U.S.PATENT(10-11-2008).pdf | 2008-11-10 |
| 2 | in-pct-2002-00136-mum-specification(amended)-(10-11-2008).pdf | 2008-11-10 |
| 3 | IN-PCT-2002-00136-MUM-POWER OF AUTHORITY(10-11-2008).pdf | 2008-11-10 |
| 4 | IN-PCT-2002-00136-MUM-PETITION UNDER RULE 138(10-11-2008).pdf | 2008-11-10 |
| 5 | IN-PCT-2002-00136-MUM-PETITION UNDER RULE 137(10-11-2008).pdf | 2008-11-10 |
| 6 | IN-PCT-2002-00136-MUM-FORM 3(10-11-2008).pdf | 2008-11-10 |
| 7 | IN-PCT-2002-00136-MUM-FORM 2(TITLE PAGE)-(10-11-2008).pdf | 2008-11-10 |
| 8 | in-pct-2002-00136-mum-form 2(10-11-2008).pdf | 2008-11-10 |
| 9 | IN-PCT-2002-00136-MUM-FORM 1(10-11-2008).pdf | 2008-11-10 |
| 10 | in-pct-2002-00136-mum-drawing(amended)-(10-11-2008).pdf | 2008-11-10 |
| 11 | IN-PCT-2002-00136-MUM-DRAWING(10-11-2008).pdf | 2008-11-10 |
| 12 | IN-PCT-2002-00136-MUM-DESCRIPTION(COMPLETE)-(10-11-2008).pdf | 2008-11-10 |
| 13 | IN-PCT-2002-00136-MUM-CORRESPONDENCE(10-11-2008).pdf | 2008-11-10 |
| 14 | IN-PCT-2002-00136-MUM-CLAIMS(10-11-2008).pdf | 2008-11-10 |
| 15 | IN-PCT-2002-00136-MUM-CANCELLED PAGES(10-11-2008).pdf | 2008-11-10 |
| 16 | in-pct-2002-00136-mum-abstract(amended)-(10-11-2008).pdf | 2008-11-10 |
| 17 | IN-PCT-2002-00136-MUM-ABSTRACT(10-11-2008).pdf | 2008-11-10 |
| 18 | in-pct-2002-00136-mum-form 2(title page)-(granted)-(22-12-2008).pdf | 2008-12-22 |
| 19 | in-pct-2002-00136-mum-form 2(granted)-(22-12-2008).pdf | 2008-12-22 |
| 20 | in-pct-2002-00136-mum-drawing(granted)-(22-12-2008).pdf | 2008-12-22 |
| 21 | in-pct-2002-00136-mum-description(granted)-(22-12-2008).pdf | 2008-12-22 |
| 22 | in-pct-2002-00136-mum-claims(granted)-(22-12-2008).pdf | 2008-12-22 |
| 23 | in-pct-2002-00136-mum-abstract(granted)-(22-12-2008).pdf | 2008-12-22 |
| 24 | IN-PCT-2002-00136-MUM-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(31-05-2011).pdf | 2011-05-31 |
| 25 | IN-PCT-2002-00136-MUM-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(29-05-2012).pdf | 2012-05-29 |
| 26 | in-pct-2002-00136-mum-power of authority(10-6-2002).pdf | 2018-08-08 |
| 27 | in-pct-2002-00136-mum-form 5(30-1-2002).pdf | 2018-08-08 |
| 28 | in-pct-2002-00136-mum-form 3(30-1-2002).pdf | 2018-08-08 |
| 29 | in-pct-2002-00136-mum-form 26(20-5-2010).pdf | 2018-08-08 |
| 30 | in-pct-2002-00136-mum-form 18(10-6-2005).pdf | 2018-08-08 |
| 31 | IN-PCT-2002-00136-MUM-FORM 1(30-1-2002).pdf | 2018-08-08 |
| 32 | in-pct-2002-00136-mum-drawing(30-1-2002).pdf | 2018-08-08 |
| 33 | in-pct-2002-00136-mum-description(complete)-(30-1-2002).pdf | 2018-08-08 |
| 34 | IN-PCT-2002-00136-MUM-DECLARATION(30-1-2002).pdf | 2018-08-08 |
| 35 | in-pct-2002-00136-mum-declaration(21-5-2002).pdf | 2018-08-08 |
| 36 | in-pct-2002-00136-mum-correspondence(ipo)-(27-1-2009).pdf | 2018-08-08 |
| 37 | in-pct-2002-00136-mum-correspondence(20-5-2010).pdf | 2018-08-08 |
| 38 | in-pct-2002-00136-mum-correspondence 1(11-5-2005).pdf | 2018-08-08 |
| 39 | in-pct-2002-00136-mum-claims(30-1-2002).pdf | 2018-08-08 |
| 40 | in-pct-2002-00136-mum-abstract(30-1-2002).pdf | 2018-08-08 |
| 41 | abstract1.jpg | 2018-08-08 |