Abstract: A method for transmitting secured Ethernet frames on a communication line, the method including the following in a transmitter module: receiving an Ethernet frame comprising payload data from a network layer retrieving a secure policy, defining the type of security to be applied to the Ethernet frame; producing an initialization vector based on an encryption counter and a physical address of the transmitter module; creating an authentication tag by applying an authentication algorithm on the secure policy, the initialization vector and the payload data using a shared key and the initialization vector; adding the secure policy, the initialization vector and the authentication tag to the payload data to create a secured Ethernet frame; and sending the secured Ethernet frame to a data link layer for transmission on the communication line.

Abstract: An industrial system for controlling backplane communication, including: a cluster manager including a primary switch linked to a primary control module, at least one Input/Output, I/O, module including a secondary switch linked to a secondary control module, a unidirectional communication line linking the cluster manager to the at least one IO module through passive base plates, wherein the cluster manager includes a transmission port and a reception port on the unidirectional communication line and the at least one Input/Output module includes a reception port on the unidirectional communication line, wherein the primary control module is configured to generate a pulse via the transmission port on the unidirectional communication line, wherein, upon reception of the pulse, the primary control module is configured to create a primary timestamp from a primary clock of the primary switch and the secondary control module is configured to create a secondary timestamp from a secondary clock of the secondary sw