Mark R Paley

US Patent:

6367019, Apr 2, 2002

Filed:

Mar 26, 1999

Appl. No.:

09/277439

Inventors:

Steven T. Ansell - Fremont CA
Andrew R. Cherenson - Los Altos CA
Mark E. Paley - San Carlos CA
Steven B. Katz - Santa Monica CA
Bruce Schneier - Oak Park IL

Assignee:

Liquid Audio, Inc. - Redwood City CA

International Classification:

G06F 1130

US Classification:

713201, 713155, 713171, 380277, 380278

Abstract:

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 bound to a player by encrypting data of the SPT using a storage key which is unique to the player, is difficult to change, and is held in strict secrecy by the player. The SPT is bound to a particular storage medium by including data uniquely identifying the storage medium in a tamper-resistant form, e. g. , cryptographically signed. The SPT can also be bound to the storage medium by embedding cryptographic logic circuitry, e. g. , integrate circuitry, in the packaging of the storage medium. The SPT is bound by encrypting an encryption key using the embedded logic.