The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2011
Filed:
Jan. 08, 2007
Rainer Broderson, San Jose, CA (US);
Jeffrey Robbin, Los Altos, CA (US);
Augustin J. Farrugia, Cupertino, CA (US);
Rod Schultz, San Francisco, CA (US);
Rainer Broderson, San Jose, CA (US);
Jeffrey Robbin, Los Altos, CA (US);
Augustin J. Farrugia, Cupertino, CA (US);
Rod Schultz, San Francisco, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A digital rights management (DRM) system for distribution of digital content such as audio or video uses a token passing scheme to enhance security of the content from unauthorized access and use, including access by unauthorized players. The token is requested from the central content or DRM server by a host device such as a user's computer, using security related information. The token is then passed to a media player associated with the host device, the token being encrypted using a key special to that particular player. Upon receipt of the token, the player transmits back to the server certain related security information confirming receipt of the token and in return receives keys for decryption of the associated digital content. In the absence of proper passing of the token, player access to the content, or further access to other content, is denied. This also allows the player to communicate directly with the server for obtaining the keys.