1
Mark J Stefik, Peter L T Pirolli: System for controlling the distribution and use of digital works using digital tickets. Contentguard Holdings, Xerox Corporation, Marc S Kaufman, Nixon Peabody, May 22, 2001: US06236971 (465 worldwide citation)

A system for controlling the distribution and use of digital works using digital tickets. In the present invention, a “digital ticket” is used to entitle the ticket holder to exercise some usage right with respect to a digital work. Usage rights are used to define how a digital work may be used or d ...


2
Wang Xin, Ta Thanh T: System and method for protection of digital works. Contentguard Holdings, October 17, 2001: EP1146715-A1 (106 worldwide citation)

A method of protecting a digital work uses a blind transformation function to transform an encrypted digital work into encrypted presentation data. The originator's digital content is protected in its original form by not being decrypted. This method enables the rendering or replay application to pr ...


3
Mark J Stefik, Peter L T Pirolli: System for controlling the distribution and use of digital works using digital tickets. ContentGuard, Marc S Kaufman Esq, Nixon Peabody, March 30, 2004: US06714921 (102 worldwide citation)

A system for controlling the distribution and use of digital works using digital tickets. In the present invention, a “digital ticket” is used to entitle the ticket holder to exercise some usage right with respect to a digital work. Usage rights are used to define how a digital work may be used or d ...


4
Prasad Ram, Thanh T Ta, Xin Wang: Self-protecting documents. Contentguard Holdings, Marc S Kaufman, Nixon Peabody, February 11, 2003: US06519700 (86 worldwide citation)

A system and method for the secure distribution of electronic documents reduces the likelihood of unauthorized reproduction and redistribution by either authorized or unauthorized recipients. A self-protecting document (SPD) contains an encrypted document as well as a secure set of permissions and t ...


5
Xin Wang: System and method for protection of digital works. ContentGuard Holdings, Nixon Peabody, Marc S Kaufman, April 26, 2005: US06885748 (79 worldwide citation)

A method of protecting a digital work uses a format preserving encryption scheme to encrypt the digital work. This enables any native replay application or rendering application to transform an encrypted digital work into encrypted presentation data. The originator's digital content is protected in ...


6
Mark J Stefik, Peter L T Pirolli: Method and system for conducting transactions between repositories using a repository transaction protocol. ContentGuard Holdings, Marc S Kaufman, Nixon Peabody, May 9, 2006: US07043453 (75 worldwide citation)

A method and apparatus for establishing a secure communications channel between a first repository and a second repository using a repository transaction protocol. A registration identifier and registration message including an identification certificate, and an identifier of a master repository tha ...


7
Karimireddy Hari Reddy, Guillermo Lao, Andrej Budo Marek: Protected content distribution system. ContentGuard Holdings, Marc S Kaufman, Nixon Peabody, November 30, 2004: US06824051 (73 worldwide citation)

A system and method for managing use of items having usage rights associated therewith. In one embodiment, the method includes receiving a request for a license associated with an item on behalf of a license requesting user, the license requesting user having an associated identification mechanism. ...


8
Thanh Ta, Xin Wang: Systems and methods for integrity certification and verification of content consumption environments. ContentGuard Holdings, Marc S Kaufman, Nixon Peabody, August 16, 2005: US06931545 (68 worldwide citation)

A content provider, such as a document publisher or distributor, provides, for example, protected content to a user, for consumption within a trusted user environment. By providing integrity certification and verification services, the authenticity of the content consumption environments can be veri ...


9
Guillermo Lao, Rory Jacobs, Mai Nguyen, Manuel Ham, Vincent Tieu: Method and apparatus for managing digital content usage rights. ContentGuard Holdings, Marc S Kaufman, Carlos R Villamar, Nixon Peabody, August 1, 2006: US07085741 (63 worldwide citation)

A method and an apparatus for specifying and editing rights associated with a content includes a general model that comprehends rights specification at different levels of the content life cycle. The rights specification includes content association, and the protection of the content is a byproduct ...


10
Mark J Stefik, Peter L T Pirolli: System for controlling the distribution and use of digital works using digital tickets. ContentGuard Holdings, Marc S Kaufman, Nixon Peabody, March 16, 2004: US06708157 (61 worldwide citation)

A system for controlling the distribution and use of digital works using digital tickets. In the present invention, a “digital ticket” is used to entitle the ticket holder to exercise some usage right with respect to a digital work. Usage rights are used to define how a digital work may be used or d ...