Session key distribution methods using a hierarchy of key servers
CA 2474915 A1 · Owner: Schmidt, Colin Martin · Inventors: Schmidt, Colin Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods, apparatuses, media and signals for facilitating secure communication between a first device and a second device are disclosed. One method includes automatically identifying a common key server potentially accessible by both the first and second devices, and obtaining a secure private key from the common key server, for use in encrypting communications between the first and second devices. Identifying may include identifying as the common key server a key server at an intersection of a first communication path defined between a first key server having a previously established relationship with the first device and a master key server, and a second communication path defined …
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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 February 28, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2025.
- 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.