1
Philip R Wiser, Andrew R Cherenson, Steven T Ansell, Susan A Cannon: Secure online music distribution system. Liquid Audio, James D Ivey, May 7, 2002: US06385596 (982 worldwide citation)

A computer implemented online music distribution system provides for the secure delivery of audio data and related media, including text and images, over a public communications network. The online music distribution system provides security through multiple layers of encryption, and the cryptograph ...


2
Steven T Ansell, Andrew R Cherenson, Mark E Paley, Steven B Katz, John Michael Kelsey Jr, Bruce Schneier: Copy security for portable music players. Liquid Audio, James D Ivey, April 2, 2002: US06367019 (257 worldwide citation)

Data such as a musical track is stored as a secure portable track (SPT) which can be bound to one or more players and can be bound to a particular storage medium, restricting playback of the SPT to the specific players and ensuring that playback is only from the original storage medium. The SPT is b ...


3
Steven T Ansell, Andrew R Cherenson: Territorial determination of remote computer location in a wide area network for conditional delivery of digitized products. Liquid Audio, James D Ivey Esq, November 21, 2000: US06151631 (188 worldwide citation)

Digital products are delivered to a client computer through a wide area network such as the Internet only upon determination that the client computer is located in a geopolitical territory, such as a country or state, for which delivery of the digital product is authorized. A server computer estimat ...


4
Philip R Wiser, Andrew R Cherenson, Steven T Ansell, Susan A Cannon: Secure online music distribution system. Microsoft Corporation, Woodcock Washburn, March 15, 2005: US06868403 (154 worldwide citation)

A computer implemented online music distribution system provides for the secure delivery of audio data and related media, including text and images, over a public communications network. The online music distribution system provides security through multiple layers of encryption, and the cryptograph ...


5
Philip R Wiser, Andrew R Cherenson, Steven T Ansell, Susan A Cannon: Secure online music distribution system. Microsoft Corporation, Woodcock Washburn, August 28, 2007: US07263497 (126 worldwide citation)

A secure music distribution system securely distributes digital products such as music, video, and/or computer software along with related media over a public telecommunications network, such as the Internet, employing a client-server architecture. The digital products are stored and controlled by a ...


6
Steven T Ansell, Andrew R Cherenson, Leon Rishniw, Susan A Cannon, Edward J Allard, Jason S Brownell, Micah Stroud: Adaptable security mechanism for preventing unauthorized access of digital data. Microsoft Corporation, Klarquist Sparkman, September 14, 2004: US06792113 (82 worldwide citation)

Content such as computer software, data representing audiovisual works, and electronic documents can converted from a machine-bound state to user-bound state without modification to the content data itself. Instead, keys used to access the content are converted from the machine-bound state to the us ...


7
Steven T Ansell, Andrew R Cherenson: Territorial determination of remote computer location in a wide area network for conditional delivery of digitized products. Microsoft Corporation, Woodcock Washburn, November 30, 2004: US06826617 (72 worldwide citation)

Digital products are delivered to a client computer through a wide area network such as the Internet only upon determination that the client computer is located in a geopolitical territory, such as a country or state, for which delivery of the digital product is authorized. A server computer estimat ...


8
Philip R Wiser, Andrew R Cherenson, Tze Yee Szeto: System and method for secure transfer of digital data to a local recordable storage medium. Liquid Audio, James D Ivey, December 11, 2001: US06330675 (68 worldwide citation)

A device securely decrypts and writes an encrypted digital file to a local recordable storage medium. The device uses two decryption engines. The first decryption engine incrementally decrypts the encrypted digital file, which is then preprocessed and re-encrypted to form an intermediate file. The s ...


9
Steven T Ansell, Andrew R Cherenson, Leon Rishniw, Susan A Cannon, Edward J Allard, Jason S Brownell, Micah Stroud: Adaptable security mechanism for preventing unauthorized access of digital data. Microsoft Corporation, Klarquist Sparkman, October 13, 2009: US07603563 (11 worldwide citation)

Content such as computer software, data representing audiovisual works, and electronic documents can converted from a machine-bound state to user-bound state without modification to the content data itself. Instead, keys used to access the content are converted from the machine-bound state to the us ...


10
Steven T Ansell, Andrew R Cherenson: Territorial determination of remote computer location in a wide area network for conditional delivery of digitized products. Microsoft Corporation, Woodcock Washburn, February 23, 2010: US07668960 (2 worldwide citation)

Digital products are delivered to a client computer through a wide area network such as the Internet only upon determination that the client computer is located in a geopolitical territory, such as a country or state, for which delivery of the digital product is authorized. A server computer estimat ...