Data scrambling system for a shared transmission medium
CA 2425388 A1 · Owner: Mitchell, Gordon Thomas · Inventors: Mitchell, Gordon Thomas; Ree, Bradley Richard; Terry, John B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods of providing added security for communications between a server (36) and a particular client modem (70) on a shared communication media (50). The methods provide for passing communications containing scrambled keys to be used to form scrambling seeds for scrambling subsequent messages. In a preferred embodiment, both the server (36) and the client modem (70) generate and pass keys to be used for the communications between the server (36) and that client modem (70) to achieve a dynamic dual key scrambling system. In the preferred embodiment, the MAC or medium access control address for each client modem is used as a seed for encryption. Additionally a seed based on the most , …
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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 8, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2023.
- 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.