Title of Invention

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.

Full Text	N/A

Documents:

abstract1.jpg

IN-PCT-2002-00136-MUM-ABSTRACT(10-11-2008).pdf

in-pct-2002-00136-mum-abstract(30-1-2002).pdf

in-pct-2002-00136-mum-abstract(amended)-(10-11-2008).pdf

in-pct-2002-00136-mum-abstract(granted)-(22-12-2008).pdf

IN-PCT-2002-00136-MUM-CANCELLED PAGES(10-11-2008).pdf

IN-PCT-2002-00136-MUM-CLAIMS(10-11-2008).pdf

in-pct-2002-00136-mum-claims(30-1-2002).pdf

in-pct-2002-00136-mum-claims(granted)-(22-12-2008).pdf

in-pct-2002-00136-mum-correspondence 1(11-5-2005).pdf

IN-PCT-2002-00136-MUM-CORRESPONDENCE(10-11-2008).pdf

in-pct-2002-00136-mum-correspondence(20-5-2010).pdf

in-pct-2002-00136-mum-correspondence(ipo)-(27-1-2009).pdf

in-pct-2002-00136-mum-declaration(21-5-2002).pdf

IN-PCT-2002-00136-MUM-DECLARATION(30-1-2002).pdf

IN-PCT-2002-00136-MUM-DESCRIPTION(COMPLETE)-(10-11-2008).pdf

in-pct-2002-00136-mum-description(complete)-(30-1-2002).pdf

in-pct-2002-00136-mum-description(granted)-(22-12-2008).pdf

IN-PCT-2002-00136-MUM-DRAWING(10-11-2008).pdf

in-pct-2002-00136-mum-drawing(30-1-2002).pdf

in-pct-2002-00136-mum-drawing(amended)-(10-11-2008).pdf

in-pct-2002-00136-mum-drawing(granted)-(22-12-2008).pdf

IN-PCT-2002-00136-MUM-FORM 1(10-11-2008).pdf

IN-PCT-2002-00136-MUM-FORM 1(30-1-2002).pdf

in-pct-2002-00136-mum-form 18(10-6-2005).pdf

in-pct-2002-00136-mum-form 2(10-11-2008).pdf

in-pct-2002-00136-mum-form 2(granted)-(22-12-2008).pdf

IN-PCT-2002-00136-MUM-FORM 2(TITLE PAGE)-(10-11-2008).pdf

in-pct-2002-00136-mum-form 2(title page)-(granted)-(22-12-2008).pdf

in-pct-2002-00136-mum-form 26(20-5-2010).pdf

IN-PCT-2002-00136-MUM-FORM 3(10-11-2008).pdf

in-pct-2002-00136-mum-form 3(30-1-2002).pdf

in-pct-2002-00136-mum-form 5(30-1-2002).pdf

IN-PCT-2002-00136-MUM-PETITION UNDER RULE 137(10-11-2008).pdf

IN-PCT-2002-00136-MUM-PETITION UNDER RULE 138(10-11-2008).pdf

IN-PCT-2002-00136-MUM-POWER OF AUTHORITY(10-11-2008).pdf

in-pct-2002-00136-mum-power of authority(10-6-2002).pdf

in-pct-2002-00136-mum-specification(amended)-(10-11-2008).pdf

IN-PCT-2002-00136-MUM-U.S.PATENT(10-11-2008).pdf