Secure teleconferencing system
CA 1306044 C · Owner: Lee, Phil Joong · Inventors: Lee, Phil Joong; Yacobi, Yacov; Brickell, Ernest Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secure audio teleconferencing system is disclosed. The secure teleconferencing system comprises a centralized facility or bridge to which a plurality of participants is connected. The role of the bridge is to receive encrypted message signals from the participants and to add the encrypted message signals modulo some, known number. The result is then transmitted to the participants. Each participant is able to decrypt the modular sum of encrypted message signals to obtain the, desired ordinary sum of clear text message signals. In accordance with the invention, the message signals remain encrypted throughout processing by the bridge. There are no non-encrypted message
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
- Granted August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 2009.
- 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.