Eric John Swenson

US Patent:

7055039, May 30, 2006

Filed:

Sep 29, 2003

Appl. No.:

10/675430

Inventors:

Pierre Chavanne - Davis CA, US
John Hwa - Fremont CA, US
Lakshmana Pamarthy - Santa Clara CA, US
Carl Quinn - San Jose CA, US
Ralph Hill - Los Gatos CA, US
Eric Swenson - Soquel CA, US
Motomasa Futagami - Sunnyvale CA, US
Atsushi Mituszawa - Kanagawa, JP

Assignee:

Sony Corporation - Tokyo
Sony Electronics Inc. - Park Ridge NJ

International Classification:

H04L 9/00
G06F 11/30

US Classification:

713193, 380 28, 380 37, 380268

Abstract:

Protection of digital content using a specific application of block cipher cryptography is described. The digital content is encrypted using an encryption key and a calculated initialization vector. The digital content includes a plurality of strides of data and each stride includes a string of data to be encrypted and a block of data to be encrypted. The calculated initialization vector to be used to encrypt the block of data is derived from the string of data in the stride to be encrypted. Furthermore, the initialization vector is calculated by performing an exclusive disjunction function on a seed value and the string of data for each stride.

US Patent:

7213266, May 1, 2007

Filed:

Jun 11, 2001

Appl. No.:

09/879743

Inventors:

David P. Maher - Livermore CA, US
James M. Rudd - San Francisco CA, US
Eric J. Swenson - Santa Cruz CA, US
Richard A. Landsman - Scotts Valley CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

G06F 7/04
G06Q 50/00

US Classification:

726 26, 726 27, 726 28, 726 29, 726 30, 705 2, 705 59

Abstract:

Systems and methods are disclosed for managing and protecting electronic content and applications. Applications, content, and/or users can be given credentials by one or more credentialing authorities upon satisfaction of a set of requirements. Rights management software/hardware is used to attach and detect these credentials, and to enforce rules that indicate how content and applications may be used if certain credentials are present or absent. In one embodiment an application may condition access to a piece of electronic content upon the content's possession of a credential from a first entity, while the content may condition access upon the application's possession of a credential from a second entity and/or the user's possession of a credential from a third entity. Use of credentials in this manner enables a wide variety of relatively complex and flexible control arrangements to be put in place and enforced with relatively simple rights management technology.

US Patent:

7406603, Jul 29, 2008

Filed:

Aug 31, 2000

Appl. No.:

09/653517

Inventors:

Michael K. MacKay - Los Altos CA, US
W. Olin Sibert - Lexington MA, US
Richard A. Landsman - Scotts Valley CA, US
Eric J. Swenson - Santa Cruz CA, US
William Hunt - Walnut Creek CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

G06F 11/30
G06F 12/14
G06F 7/04
G06F 7/58
G06F 12/00
H04L 9/32
G06F 17/30
G06K 19/00
G11C 7/00

US Classification:

713193, 713189, 726 16, 726 17, 726 21, 726 26

Abstract:

Systems and methods are provided for protecting electronic content from the time it is packaged through the time it is experienced by an end user. Protection against content misuse is accomplished using a combination of encryption, watermark screening, detection of invalid content processing software and hardware, and/or detection of invalid content flows. Encryption protects the secrecy of content while it is being transferred or stored. Watermark screening protects against the unauthorized use of content. Watermark screening is provided by invoking a filter module to examine content for the presence of a watermark before the content is delivered to output hardware or software. The filter module is operable to prevent delivery of the content to the output hardware or software if it detects a predefined protection mark. Invalid content processing software is detected by a monitoring mechanism that validates the software involved in processing protected electronic content. Invalid content flows can be detected by scanning the information passed across system interfaces for the attempted transfer of bit patterns that were released from an application and/or a piece of content management software.

US Patent:

7694342, Apr 6, 2010

Filed:

Apr 27, 2007

Appl. No.:

11/741556

Inventors:

David P. Maher - Livermore CA, US
James M. Rudd - San Francisco CA, US
Eric J. Swenson - Santa Cruz CA, US
Richard A. Landsman - Scotts Valley CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

G06F 7/00
G06F 21/24

US Classification:

726 26, 726 27, 726 28, 726 29, 726 30, 705 50, 705 51, 705 52, 705 54

Abstract:

Systems and methods are disclosed for managing and protecting electronic content and applications. Applications, content, and/or users can be given credentials by one or more credentialing authorities upon satisfaction of a set of requirements. Rights management software/hardware is used to attach and detect these credentials, and to enforce rules that indicate how content and applications may be used if certain credentials are present or absent. In one embodiment an application may condition access to a piece of electronic content upon the content's possession of a credential from a first entity, while the content may condition access upon the application's possession of a credential from a second entity and/or the user's possession of a credential from a third entity. Use of credentials in this manner enables a wide variety of relatively complex and flexible control arrangements to be put in place and enforced with relatively simple rights management technology.

US Patent:

7770031, Aug 3, 2010

Filed:

Jun 19, 2008

Appl. No.:

12/142688

Inventors:

Michael K. MacKay - Los Altos CA, US
W. Olin Sibert - Lexington MA, US
Richard A. Landsman - Scotts Valley CA, US
Eric J. Swenson - Santa Cruz CA, US
William Hunt - Walnut Creek CA, US

Assignee:

Intertrust Technologies Corp. - Sunnyvale CA

International Classification:

G06F 11/30
G06F 12/14
G06F 7/04
G06F 7/58
G06F 12/00
H04L 9/32
G06F 17/30
G06K 19/00
G11C 7/00

US Classification:

713193, 713189, 726 16, 726 17, 726 21, 726 26

Abstract:

Systems and methods are provided for protecting electronic content from the time it is packaged through the time it is experienced by an end user. Protection against content misuse is accomplished using a combination of encryption, watermark screening, detection of invalid content processing software and hardware, and/or detection of invalid content flows. Encryption protects the secrecy of content while it is being transferred or stored. Watermark screening protects against the unauthorized use of content. Watermark screening is provided by invoking a filter module to examine content for the presence of a watermark before the content is delivered to output hardware or software. The filter module is operable to prevent delivery of the content to the output hardware or software if it detects a predefined protection mark. Invalid content processing software is detected by a monitoring mechanism that validates the software involved in processing protected electronic content. Invalid content flows can be detected by scanning the information passed across system interfaces for the attempted transfer of bit patterns that were released from an application and/or a piece of content management software.

US Patent:

7801819, Sep 21, 2010

Filed:

Oct 1, 2004

Appl. No.:

10/957109

Inventors:

Eric John Swenson - Soquel CA, US
Ryuji Ishiguro - Tokyo, JP
Motohiko Nagano - Tokyo, JP
Pierre Chavanne - Davis CA, US

Assignee:

Sony Corporation - Tokyo
Sony Electronics, Inc. - Park Ridge NJ

International Classification:

G06F 21/00

US Classification:

705 52, 380201, 705 51, 705 54, 705 57, 705 59, 707 9, 7071041, 713155, 713156, 713182, 713183, 713184, 726 26, 726 27, 726 28, 726 29, 726 31, 726 32

Abstract:

Methods and systems for controlling the distribution of digital content are provided. A license holder acquires protected content and an original digital license to the protected content from a content provider system. The license holder in turn delegates all or part of the grants in that original license to other qualified devices or clients. The content remains in its original, protected or encrypted form while it is delivered from the license holder to the client along with a digital sublicense that the client receives from the original license holder, whereupon the content can then be rendered. The original digital license defines or governs the conditions under which such delegation occurs, and includes terms under which such delegation is permitted to continue in order to enforce the intent of the content provider.

US Patent:

7861308, Dec 28, 2010

Filed:

Nov 28, 2005

Appl. No.:

11/289099

Inventors:

Marc E. Strohwig - Walnut Creek CA, US
Yoji Kawamoto - Tokyo, JP
Motohiko Nagano - Tokyo, JP
Pierre Chavanne - Davis CA, US
Norifumi Goto - Tokyo, JP
Eric John Swenson - Soquel CA, US

Assignee:

Sony Corporation - Tokyo
Sony Electronics Inc. - Park Ridge NJ

International Classification:

G06F 7/04

US Classification:

726 26, 713178

Abstract:

A method for monitoring time so that the use of protected content can be controlled includes receiving a trusted time value from a trusted authority external to a client device. When the client is no longer in communication with the trusted authority, the previously-received trusted time value is updated by use of the client's operating system counter so that a calculated trusted time value is derived for content license evaluation purposes.

US Patent:

8103004, Jan 24, 2012

Filed:

Aug 18, 2004

Appl. No.:

10/921498

Inventors:

Pierre Chavanne - Davis CA, US
Oscar Steele - Sunnyvale CA, US
Yoji Kawamoto - Tokyo, JP
Eric Swenson - Soquel CA, US

Assignee:

Sony Corporation - Tokyo
Sony Electronics Inc. - Park Ridge NJ

International Classification:

H04L 9/00
H04N 21/2347
H04N 21/00

US Classification:

380281, 726 27, 726 28, 726 29, 726 30, 380277

Abstract:

The present embodiments advantageously provide methods and systems for use in decrypting content, and in some preferred embodiments expanding a security environment to distribute the computational processing involved in decryption. In some embodiments, a method for use in decrypting content is provided that receives a first content key at a first system for the decryption of a first track of encrypted content; encrypts the first content key according to a first instance key known at the first system; communicates the first encrypted content key over an externally accessible communication link to a second system; generates the first instance key at the second system independent of the first system; decrypts the first encrypted content key using the generated first instance key at the second system; and decrypts the first track of encrypted content using the first unencrypted content key at the second system.