Method for data security in a digital telecommunication system
CA 2126960 A1 · Owner: Siemens Aktiengesellschaft · Inventors: Mohrmann, Karl-Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For data security in a digital telecommunication system having a plurality of subscriber equipment, a public key is respectively calculated from a secret key prescribed in a first subscriber equipment. This public key is communicated to a different second subscriber equipment that it participates with in a connection with the subscriber equipment, being used in this different second subscriber equipment for encoding secondary key information for matching the first subscriber equipment to transmission modalities that are repeatedly modified and that are provided in the second subscriber equipment for the first subscriber equipment. The subscriber equipment can calculate new keys from time to …
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 June 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2016.
- 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.