PROCEDE DE GESTION DE CLES D'EMBROUILLAGE ET DE DEBROUILLAGE D'APPAREILS DE TRANSMISSION DE DONNEES

摘要

The method involves scrambling transmitted data using a first key (11). The first key is associated with a transition key (12) periodically transforms (10) the first key into a second future scrambling key (13). At the receiver, a current descrambling key (31) is associated with another transition key (32) for synchronous transformation (30) into a second future descrambling key (33). The receiver can enter transmission mode to send an acknowledgement (40) scrambled with the future key for interpretation by the sender in reception mode as evidence that the future descrambling key is available for any further messages.