Key management protocol and authentication system for secure internet protocol rights management architecture
CA 2467353 C · Owner: Google Technology Holdings Llc · Inventors: Moroney, Paul; Peterka, Petr; Sprunk, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital rights management architecture for securely delivering content to authorized consumers. The architecture includes a content provider (202) and a consumer system (216) for requesting content from the content provider. The content provider generates a session rights object (202B) having purchase options selected by the consumer. A KDC (204) thereafter provides authorization data to the consumer system. Also a caching server (215) is , provided for comparing the purchase options with the authorization data. The caching server (215) forwards the requested content to the consumer system (216) if the purchase options match the authorization data. Note that the caching (215) …
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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 November 15, 2002 and granted March 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2024.
- 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.