A method for loading encryption keys into secure transmission devices
CA 2134974 C · Owner: Rager, Kent D. · Inventors: Lay, Steven H.; Rager, Kent D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An encryption code and at least one key are provided to a secure transmission device via, an external keying device (100) and stored in a first volatile memory (102). An encrypted representation of the at least one key based, on the encryption code and the at least one key, is generated and stored in a non-volatile memory (103). Upon power down of the secure transmission device, the encryption code is stored in a second volatile memory (106) and the at least one key and encryption code stored in the first volatile memory (102) are erased.
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 February 23, 1994 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.