Data processing system, data processing method, and program providing medium

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7116785
APP PUB NO 20020094088A1
SERIAL NO

09912174

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The inventive data processing apparatus enables own memory device to store a plurality of key distribution approval data files each containing such a header data comprising a number of 'link-count' data units each designating actual number of applicable contents data per decodable contents key based on an enabling key block (EKB) distribution key enciphering key (KEK) enciphered by a corresponding enabling key block (EKB) provided for by a hierarchy key tree structure. When storing a plurality of the enabling key blocks (EKB) in a memory device, such a key enciphering key (KEK) contained in an enabling key block (EKB) having a number of link-count data units is previously decoded and stored in the memory device. By way of applying the stored (KEK) when utilizing contents data, the enabling key block (EKB) processing step is deleted, whereby promoting higher efficiency in the utilization of contents data.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SONY CORPORATIONTOKYO, JP25952

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Okaue, Takumi Kanagawa, JP 55 931

Cited Art Landscape

Patent Info (Count) # Cites Year
 
GLOBALFOUNDRIES INC. (1)
* 6609116 System and method for securely updating copy-protected media 30 1999
 
ORACLE AMERICA, INC. (1)
* 6049878 Efficient, secure multicasting with global knowledge 169 1998
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Intellectual Ventures I LLC (3)
8341406 System and method for providing different levels of key security for controlling access to secured items 0 2011
8943316 Document security system that permits external users to gain access to secured files 0 2012
9129120 Methods and systems for providing access control to secured data 4 2014
 
SOCIONEXT INC. (1)
* 8306230 Information processing apparatus playing encrypted content distributed through network 1 2007
 
HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP (2)
* 7590868 Method and apparatus for managing encrypted data on a computer readable medium 4 2005
* 2006/0179,327 Method and apparatus for managing encrypted data on a computer readable medium 8 2005
 
SONY CORPORATION (5)
* 7503073 Information managing apparatus and method, recording medium, and program 7 2003
* 2005/0075,981 Information management device, method, recording medium, and program 5 2003
* 2005/0213,765 Data processing method 3 2005
* 7861313 Information managing apparatus and method, recording medium, and program 0 2007
* 2008/0092,243 Information managing apparatus and method, recording medium, and program 2 2007
 
INTELLECTUAL VENTURES I LLC (18)
7950066 Method and system for restricting use of a clipboard application 81 2001
8065713 System and method for providing multi-location access management to secured items 41 2002
7921288 System and method for providing different levels of key security for controlling access to secured items 62 2002
8006280 Security system for generating keys from access rules in a decentralized manner and methods therefor 19 2002
8176334 Document security system that permits external users to gain access to secured files 13 2002
7921450 Security system using indirect key generation from access rules and methods therefor 38 2002
7930756 Multi-level cryptographic transformations for securing digital assets 20 2003
* 8707034 Method and system for using remote headers to secure electronic files 7 2003
8127366 Method and apparatus for transitioning between states of security policies used to secure electronic documents 12 2003
7913311 Methods and systems for providing access control to electronic data 29 2007
8543827 Methods and systems for providing access control to secured data 4 2008
RE43906 Method and apparatus for securing digital assets 7 2008
8266674 Method and system for implementing changes to security policies in a distributed security system 1 2009
8327138 Method and system for securing digital assets using process-driven security policies 3 2010
8341407 Method and system for protecting electronic data in enterprise environment 1 2011
8918839 System and method for providing multi-location access management to secured items 3 2011
8739302 Method and apparatus for transitioning between states of security policies used to secure electronic documents 1 2012
9542560 Methods and systems for providing access control to secured data 0 2013
 
GOOGLE INC. (1)
* 7386128 Conditional access system providing access to multiple programs or services 6 2004
 
PERVASIVE SECURITY SYSTEM, INC. (1)
7921284 Method and system for protecting electronic data in enterprise environment 24 2002
* Cited By Examiner

Maintenance Fees

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Apr 3, 2018
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Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00