A method for non-repudiation using a trusted third party
CA 2386502 A1 · Owner: Ecomxml Inc. · Inventors: Cai, Ming; Zhang, Chunru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protocol for prohibiting non-repudiation by transacting parties involved in an executed electronic transaction, whereby a trusted third party is responsible for ensuring non-repudiation. In this protocol a sender uses a , secret sharing technology to divide the original session key into a first subsession key and a second sub-session key. The first and second sub-session keys must be combined into the original session key in order for a recipient to decrypt a product that is encrypted with the original session key. The sender includes the first sub-session key that is encrypted with a recipient's public key and an encrypted product in a first message. Then the sender transmits 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 October 2, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.