Method to discourage digital certificate lending
CA 2317213 A1 · Owner: Brands, Stefanus A. · Inventors: Brands, Stefanus A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cryptographic method is disclosed that discourages certificate holders from lending, sharing, giving away copies of or otherwise providing to other, parties the ability to use their digital certificates. The presented method can be implemented in tamper-resistant devices for certificate holders so as, to offer a second layer of protection or could be implemented as a, software-only solution that strongly discourages certificate lending. Many variations and extensions of the basic method are described.
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 September 1, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2022.
- 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.