Nagravision S.a.

Smardtv Sa

Eric Chaubert

David Servignat

The present invention relates to a system and a device for conveniently providing rights to particular conditional access protected digital media content. A sleeve for covering a reception device for receiving the conditional access content is provided. The sleeve comprises a proximity wireless communications module including an antenna and a control chip. The reception device may be a set-top box, a telephone, a tablet computer or the like, as long as it is capable of receiving conditional access content, and may be used along with a detachable security module for decrypting control words to allow the content to be decrypted. The owner of such a reception device may purchase the sleeve which contains the rights to access conditional access content and when the sleeve is mounted on the reception device the rights are granted to the reception device by way of the proximity communications means.

System for providing access to conditional access media content

A method for encrypting a compressed video stream comprising independent data blocks and differential data blocks includes the steps of encrypting the independent data blocks with a different level of encryption than that used for the differential data blocks. In one embodiment, the differential data blocks are unencrypted. The method allows the reception of a compressed data stream using powerful algorithms on terminals having small cryptographic capacities.

Growing community of inventors

Gland, Switzerland

Eric Chaubert