Method and circuit arrangement for the secure transmission...

Details Method and circuit arrangement for the secure transmission... Method and circuit arrangement for the secure transmission...

H - Electricity

04

L

H04L 27/26 (2006.01) H04K 1/00 (2006.01) H04L 5/14 (2006.01)

Patent

CA 2396462

The invention relates to a method for securely transmitting data by hiding in point-to-point and point-to-multi-point digital transmission systems. The data stream (DS) on the transmitter side is supplied to a modulation unit (MOD). The modulation and coding parameters (MP) of the modulation method (MV) and of said modulation unit (MOD) can be changed in time. The modulation parameters (MP) are transmitted to a demodulator (DEM) by means of a secure channel (SK). The electric transmission signal (ES) is situated at the output of the modulation unit (MOD). Said signal is transmitted by means of a channel (K). The demodulator (DEM) that knows the hiding sequence regenerates the original signal and supplies the receiving data stream (DE) at the output.

L'invention concerne un procédé de transmission sécurisée de données par masquage dans des systèmes de transmission numériques point à point et point à multipoint. Le flux de données (DS), côté émission, est, à cet effet, conduit à une unité de modulation (MOD) dont les paramètres de modulation et de codage (MP) du procédé de modulation (MV) peuvent être modifiés dans le temps. Les paramètres de modulation (MP) sont transmis à un démodulateur (DEM) par l'intermédiaire d'un canal sécurisé (SK). A la sortie de l'unité de modulation (MOD) sort le signal d'émission électrique (ES) qui est transmis par l'intermédiaire d'un canal (K). Le démodulateur (DEM), qui connaît la séquence de masquage, reforme le signal d'origine et délivre, à la sortie, le flux de données de réception (DE).

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