STATUTORY LICENSE RESTRICTED DIGITAL MEDIA PLAYBACK ON PORTABLE DEVICES

• US 20140215224A1
• Filed: 04/01/2014
• Published: 07/31/2014
• Est. Priority Date: 08/23/2004
• Status: Active Grant

• Current Assignee: Sony Interactive Entertainment LLC (Sony Group Corp.)
• Original Assignee: Sony Computer Entertainment America LLC (Sony Group Corp.)
• Inventors: Navar, Murgesh, Puranik, Rajiv, Hsu, Michael, Yruski, Audrey
• Granted Patent: US 9,531,686 B2
• Time in Patent Office: Days
• US Class Current: 713/176
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/6209 to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: H04B 1/3827 Portable transceivers
• CPC Class Codes: H04L 63/0457 wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption cryptographic mechanisms or cryptographic arrangements for stream encryption H04L9/065
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 63/107 wherein the security policies are location-dependent, e.g. entities privileges depend on current location or allowing specific operations only from locally connected terminals
• CPC Class Codes: H04L 65/1059 End-user terminal functionalities specially adapted for real-time communication
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage

Abstract

Systems and methods are described for, e.g., providing a statutory audio content service on a portable device that complies with the provisions of the Digital Millennium Copyright Act (DMCA). The user can select a playlist subject to DMCA restrictions but cannot access individual items. Content playback, including skipping of content, is restricted to enforce relevant DMCA provisions. Encryption used to implement digital rights management (DRM) may be modified to enforce such content play rules or, alternatively, an additional layer of encryption may be imposed. Limitations on playback are stored along with the playlist structure in a form that is protected against modification. Information logging content playback is maintained in protected form to be uploaded and relayed to the service provider for the purpose of calculating royalty payments.

Claims

1. A method for permitting playback of content comprising:

retrieving encrypted content at a portable device, wherein the encrypted content includes a plurality of content types, wherein a first content type is encrypted using a first encryption scheme and a second content type is encrypted using a second encryption scheme;

determining whether items of encrypted content are of a first or second content type;

decrypting the items of the second content type;

performing a check to determine that the items of the first content type satisfy content play rules;

decrypting the items of the first content type that satisfy the content play rules; and

permitting playback of the decrypted items on the portable device.