Method and device for inserting and authenticating a digital signature in digital data
CA 2383536 A1 · Owner: Rayner, Douglas P. · Inventors: Rayner, Douglas P.; Miller, Matthew L.; Cox, Ingemar J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for inserting a digital signature into digital data is provided. In reference to the figure, the digital data (200) has bits and the method includes the steps of: assigning predetermined bits of the digital data for receiving the digital signature (202); signing the digital data excluding the predetermined bits (210 and 220) resulting in the digital signature; and inserting the digital signature into the predetermined bits of the digital data (226) for subsequent authentication of the digital data. Also provided is a method for authenticating digital data having the embedded digital signature in the predetermined bits of the digital data including the steps of: extracting …
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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 August 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 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.