Verimatrix, Inc.

Pioneer Digital Technologies, Inc.

Eiji Oga

Akinwale Olugbemiga Olugbile

Robert T Kulakowski

Nicolas Pauli

Christopher Rae

Kazuhiro Miyoshi

Subrata Datta

Park Uh

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.

Off-line content delivery system with layered encryption

The present invention provides an apparatus and method for efficiently running an execution image containing instructions for running a computer program in a set-top box. A non-volatile memory stores a compressed version of the execution image. A volatile memory is configured to execute the execution image. A computing unit transfers and decompresses the compressed version of the execution image from the non-volatile memory to the volatile memory where the execution image in non-compressed form can be executed efficiently.

Method and apparatus for efficiently running an execution image using volatile and non-volatile memory

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San Diego, CA, United States of America

Eiji Oga