Method of secured communications in a telecommunications system

Details Method of secured communications in a telecommunications system Method of secured communications in a telecommunications system

H - Electricity

04

M

379/1

H04M 3/16 (2006.01) H04L 9/00 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1256610

ABSTRACT Method of Secured Communications in a Telecommunications System. The telecommunications system includes at least two exchanges and a plurality of user equipments. Each equipment includes a store for holding a user variable data word particular to that user. Each exchange is provided with a store for holding all the user variable data words of the users connected to it, and each exchange is also provided with its own random variable data word. When a first user makes a secure call to a second user, the first user equipment encrypts the call using its particular user variable data word and sends the encrypted data to its own exchange. The exchange decrypts the call using the particular user variable data word and generates the random variable data word that will be used for the call. The exchange encrypts the random variable data word with the particular user variable data word and returns it to the first user. The exchange also sends the random variable data word to the second user's exchange which encrypts it with the user variable data word particular to the second user, and sends it to the second user.

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