Key management system for digital cinema
CA 2596872 C · Owner: Robert, Arnaud · Inventors: Robert, Arnaud
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Key management in a digital cinema system (10 100 and 1000) occurs by , encrypting a feature key associated with encrypted content with a transmission key exchanged with a decryption module (60 601, 602, 6001, 6002, 6003 and , 6004) that serves to decrypt encrypted content. The encrypted feature key undergoes transmission to the decryption module to enable decryption of the encrypted content. In this way, the decryption module will only have the capability of decrypting content based on that module's own key.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 18, 2006 and granted March 1, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.