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:
Dec. 03, 2013
Filed:
Jul. 20, 2010
Christopher Rae, San Diego, CA (US);
Robert Kulakowski, Rancho Santa Fe, CA (US);
Subrata Datta, San Diego, CA (US);
Eiji Oga, San Diego, CA (US);
Nicolas Pauli, San Diego, CA (US);
Akinwale Olugbemiga Olugbile, San Diego, CA (US);
Christopher Rae, San Diego, CA (US);
Robert Kulakowski, Rancho Santa Fe, CA (US);
Subrata Datta, San Diego, CA (US);
Eiji Oga, San Diego, CA (US);
Nicolas Pauli, San Diego, CA (US);
Akinwale Olugbemiga Olugbile, San Diego, CA (US);
Verimatrix, Inc., San Diego, CA (US);
Abstract
Systems and methods are described for over-encrypting symmetrically pre-encrypted content for off-line delivery to playback devices using portable media drives in accordance with embodiments of the invention. One embodiment of the method of the invention includes symmetrically pre-encrypting the content, receiving a request to issue content for playback on at least one playback device associated with a user account, where each playback device includes a processor containing a private key assigned to the playback device by a conditional access system, generating a content key and over-encrypting at least a portion of the symmetrically pre-encrypted content in response to the request, obtaining a public key for each playback device, encrypting a copy of the content key using the public key of each playback device associated with the user account, and delivering the over-encrypted content and the at least one encrypted copy of the content key to a playback device associated with the user account.