Key agreement and re-keying over a bidirectional communication path
CA 2561796 C · Owner: Research In Motion Limited · Inventors: Brown, Michael K.; Little, Herbert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method carried out by a first system for establishing a secure bidirectional communication path between the first system and a second system for an exchange of one or more messages is described. A first key pair having a first public key and a first private key is generated and a second key pair having , a second public key and a second private key is generated. The second public key is generated based upon a shared secret known to the first system and the second system. The second public key and the first public key are sent to the second system. A third public key and a fourth public key generated by the second system are received, wherein the fourth public key is generated based …
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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 March 30, 2005 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.