Method and system for validating a succession of events experienced by a device

摘要

The invention relates to a method of validating a succession of events in the life of a device (10) relative to a predefined succession of events, including the following steps: for each event of the succession: calculating a current value of a traceability mark by applying to an identifier of the event a cryptographic hashing function with parameters set by the preceding value of the traceability mark; storing this current value on the device; after the succession of events, a checking system obtaining the latest value of the traceability mark stored on the device; this system generating the value of a theoretical mark by applying the hashing function successively to identifiers taken in the order of the events of the predefined succession; and if the latest value of the traceability mark is equal to the theoretical mark, validating that the predefined succession of events has been experienced by the device.