Controlled-access method and system for transmitting scrambled digital data in a data exchange network

摘要

The present invention relates to a method for transmitting digital data with at least access control to the one terminal (access control) that are connected to the data exchange network (2). The present invention includes the steps of scrambling the digital data to be transmitted using the control word (control word, CW), the first random data (ALEA1) and the digital sequence is calculated in accordance with the characteristic (distinctive) function of the data to a terminal in the network ( sequence, S) the step of generating to the terminal 4, the digital sequence (S) and as a function of the control words (CW), the method comprising computing the at least one unique digital key (K) to the terminal 4 , and the corresponding unique digital key (K), characterized in that it comprises the step of transmitting to the terminal (4).