Abstract:
The current signature of an electronic function is masked by controlling a current source that supplies power for the electronic function is controlled in a dynamically-varying manner. Excess current is detected and compared to a threshold. If the detected excess current meets the threshold, the operation of the electronic function is modified, for example by controlling a clock.
Abstract:
A device for detecting a laser attack made on an integrated circuit chip comprises a bipolar transistor of a first type formed in a semiconductor substrate, that bipolar transistor comprising a parasitic bipolar transistor of a second type. A buried region, forming the base of the parasitic bipolar transistor, operates as a detector of the variations in current flowing caused by impingement of laser light on the substrate.
Abstract:
A device for detecting a laser attack made on an integrated circuit chip comprises a bipolar transistor of a first type formed in a semiconductor substrate, that bipolar transistor comprising a parasitic bipolar transistor of a second type. A buried region, forming the base of the parasitic bipolar transistor, operates as a detector of the variations in current flowing caused by impingement of laser light on the substrate.
Abstract:
A device for detecting a laser attack in an integrated circuit chip formed in the upper P-type portion of a semiconductor substrate incorporating an NPN bipolar transistor having an N-type buried layer, including a detector of the variations of the current flowing between the base of said NPN bipolar transistor and the substrate.
Abstract:
The disclosure relates to a countermeasure method in an electronic microcircuit, comprising successive process phases executed by a circuit of the microcircuit, and adjusting a power supply voltage between power supply and ground terminals of the circuit, as a function of a random value generated for the process phase, at each process phase executed by the circuit.
Abstract:
An electric charge flow element including, on an insulating support, a stack of a first electrode, of a dielectric layer having at least one portion capable of letting charges flow by tunnel effect, and of a second electrode, wherein at least one of the electrodes is made of undoped polysilicon.
Abstract:
The disclosure concerns a method implemented by a processing device. The method includes performing a first execution by the processing device of a computing function based on one or more initial parameters stored in a first memory device. The execution of the computing function generates one or more modified values of at least one of the initial parameters, wherein during the first execution the one or more initial parameters are read from the first memory device and the one or more modified values are stored in a second memory device. The method also includes performing a second execution by the processing device of the computing function based on the one or more initial parameters stored in the first memory device.