Trusted Logic Mobility

Christophe Colas

Alexandre Frey

Axelle Apvrille

The invention relates to a system and method for making data secure. The inventive system is characterized in that it comprises:&#x2014;a monotonic counter;&#x2014;a computational entity;&#x2014;a physical data medium comprising one or a plurality of data blocks, a first master block comprising the last value recovered from the monotonic counter, an identifier of the last data block written on said medium, a first authentication code guaranteeing the authenticity of the written data block or blocks, a second authentication code calculated from the last written data block, said data being fixed at a neutral value, and a third authentication code guaranteeing the authenticity of the first master block, and a second master block forming a replica of the first master block; and&#x2014;an authentication key. The invention is used, in particular, to make data secure against playback and sudden interruptions in service in embedded systems.

Growing community of inventors

Carrieres sur Seine, France

Christophe Colas