Patent ID: 11906581
Assignee: NAGRAVISION SàRL
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for controlling working conditions of a hardware component to camouflage current traces generated by the hardware component, the hardware component having at least one set of digital elements defining a plurality of operational datapaths, the method comprising:
(a) obtaining a random or pseudo-random value and using the random or pseudo-random value to adjust, by a control element, a working condition of the hardware component to generate an adjusted working condition;
(b) measuring a reaction of the hardware component to the adjusted working condition by a logic test circuit through processing data operations along a reference datapath of the plurality of operational datapaths, the reference datapath having a minimum duration corresponding to at least a longest of said the plurality of operational datapaths in the hardware component;
(c) detecting whether an error has taken place along the reference datapath by the logic test circuit based on the reaction measured at step (b);
(d) in response to a detection, at step (c), that the error has occurred, modifying the adjusted working condition by the control element, to generate a modified working condition.