Patent ID: 8397286

Claim:
A bidirectional gateway with enhanced security level ( 2 . 1 ) for interconnecting a first network having a first security level and at least one second network having a second security level that is lower than the security level of the first network, said device ( 2 , 1 ) comprising: a. a first interface ( 2 , 11 ) intended to receive data from and transmit data toward said first network and a second interface ( 2 , 12 ) intended to receive data from and transmit data toward said second network, b. a routing module ( 2 , 3 ) connected to the first interface ( 2 , 11 ), to a first monodirectional pathway ( 2 , 4 ; 2 , 6 ), referred to as the downlink pathway, and to a second monodirectional pathway ( 2 , 5 ; 2 , 7 ), referred to as the returnlink pathway, and provided to route, in one hand, all data on the first interface ( 2 , 11 ) to the first monodirectional pathway ( 2 , 4 ; 2 , 6 ) and, in other hand, data from the second monodirectional pathway ( 2 , 5 ; 2 , 7 ) to the first interface ( 2 , 11 ), c. an adaptation module ( 2 , 8 ) connected to the second interface ( 2 , 12 ), to said first monodirectional pathway ( 2 , 4 ; 2 , 6 ) and to said second monodirectional pathway ( 2 , 5 ; 2 , 7 ) and provided to route, in one hand, all data on the second interface ( 2 , 12 ) to the second monodirectional pathway ( 2 , 4 ; 2 , 6 ) and, in other hand, data from the first monodirectional pathway ( 2 , 5 ; 2 , 7 ) to the second interface ( 2 , 11 ), said first monodirectional pathway ( 2 , 4 ; 2 , 6 ) including means for performing a first processing and, said second monodirectional pathway ( 2 , 5 ; 2 , 7 ) including means for performing a second processing different from the first processing.