Schneider Electric Industries Sas

Jean-Michel Brun

Jean-Philippe Fassino

Thierry Chiche

Sylvain Marie

Patrick Olinet

A method provides a firmware update to an electronic device, to code signing for firmware updates of electronic devices, and a system therefor. In particular, the system and method for updates firmware that is authenticated through a public key infrastructure. The method includes an electronic device receiving a firmware update provided with a signature of a signing key, a signing certificate with a signature of a master key, and a revision number. The device verifies the signature of the master key on the signing certificate of the signing key, checks the revision number on the signing certificate of the signing key against a roll back counter, and verifies the signature of the signing key on the firmware update. The device then rejecting or accepting the received firmware update based on the outcome of the above verifying and checking.

Method for providing a firmware update of a device

System for controlling access to automation equipments connected to a first network, from at least one client station connected to a second network. The system includes determination means of a functional profile containing a list of business functions that a user of the client station is authorized to carry out on the equipment, analysing means of a frame sent on the second network by the user, in order to determine a request and a destination equipment, definition means of a filter profile for the destination equipment, containing, for each business function and for each protocol, a list of requests that the destination equipment is capable of receiving, and filter means capable of authorizing or prohibiting transmission of the sent frame on the first network, according to the frame, the functional profile of the identified user and the filter profile of the destination equipment.

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Saint Etienne de Crossey, France

Jean-Michel Brun