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:
Aug. 26, 2014
Filed:
Feb. 12, 2009
Prasanna Kannan, San Diego, CA (US);
An Mei Chen, San Diego, CA (US);
Thadi M. Nagaraj, San Diego, CA (US);
Sajith Balraj, San Diego, CA (US);
Jangwon Lee, San Diego, CA (US);
Prasanna Kannan, San Diego, CA (US);
An Mei Chen, San Diego, CA (US);
Thadi M. Nagaraj, San Diego, CA (US);
Sajith Balraj, San Diego, CA (US);
Jangwon Lee, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods and apparatus for conditional access of non real-time (NRT) content in a distribution system. A method includes encrypting NRT content with a control word (CW) to generate encrypted NRT content, providing the CW to entitlement control message (ECM) generators, receiving ECMs from the ECM generators, wherein each ECM comprises a unique encryption of the CW to provide conditional access to the CW, and providing the encrypted NRT content and the ECMs for transmission over a distribution network. An apparatus includes a synchronizer configured to provide a CW to ECM generators and receive ECMs from the ECM generators, wherein each ECM comprises a unique encryption of the CW to provide conditional access to the CW, and a management module configured to encrypt the NRT content with the CW to generate encrypted NRT content and provide the encrypted NRT content and the ECMs for transmission over the distribution network.