System and method for transmitting reduced information from a certificate to perform encryption operations
CA 2450052 C · Owner: Williams, Roy · Inventors: Williams, Roy; Sie, Yu Lin; Hallin, Philip J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A certificate-based encryption mechanism in which a source client does not access , the entire certificate corresponding to a destination client when encrypting an electronic , message to be sent to the destination client. Instead the source client only , requests a portion of the certificate from a certificate server. That portion includes encryption information, but , may lack some or even all of the self-verification information in the certificate. The , certificate server preferably performs any validation of the certificate prior to sending the , encryption information to the source client. The certificate need not be separately validated , by the source client especially if the …
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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 18, 2003 and granted May 14, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.