Auto-recoverable auto-certifiable cryptosystems with unescrowed signature-only keys
CA 2356665 A1 · Owner: Young, Adam Lucas · Inventors: Young, Adam Lucas; Yung, Marcel Mordechay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for digital signature infrastructure that provides public keys (1005) which are effective only for verifying digital signatures and are , not effective for encrypting information in a way that is unrecoverable by lawenforcement entities. The method can be implemented in software thus avoiding , the need for tamper-proof hardware. The method has the property that signing private keys (1010) are not escrowed, since the corresponding public keys cannot be used effectively for criminal communications. As a result no one can impersonate the user; alternately users can prove impersonations. Furthermore the system is shadow public key resistant. A shadow public key is a …
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 December 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2021.
- 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.