Inside Secure

Eshard

Inside Contactless

Verimatrix, Inc.

Georges Gagnerot

Hugues Thiebeauld De La Crouee

Christophe Clavier

Vincent Verneuil

Benoit Feix

Gary Chew

Mylène Roussellet

Benoît Feix

Mylene Roussellet

Jean-François Grezes

Tiana Razafindralambo

Benôit Feix

Mylène Rousselet

A method for executing an operation by a circuit, may include executing a first operation to process an input data, the circuit generating during the execution of the first operation a first signal, and executing in the circuit a second operation receiving the input data and configured to add to the first signal, between first and second instants during the execution of the first operation, a continuous second signal. A combination of the first and second signal forming a resultant signal in which the second signal may be indistinctly measurable with the first signal from outside of the circuit. The second signal and the resultant signal varying as a function of the input data.

Protection method and device against a side-channel analysis

A test method of a circuit, comprising, acquiring value sets including values of a physical quantity or of logic signals, linked to the activity of a circuit to be tested when the circuit executes an operation of an operation set of distinct cryptographic operations applied to a same secret data, selecting at least two subsets of values in each value set, for each value set and each value subset, counting occurrence numbers of values of the subset, for each value set, forming all possible n-tuples associating together one of the occurrence numbers of each value subset of the value set, and computing a combined occurrence number for each n-tuple of the value set, to form an occurrence number set for the value set, and analyzing the occurrence number sets to determine the part of the secret data.

Method of testing the resistance of a circuit to a side channel analysis of second order or more

In a general aspect, a method can include: installing in a non-secure device a customized module for managing communications with a secure element, transmitting to the secure element first authentication data for authenticating the customized module, the customized module generating and transmitting to the secure element second authentication data for authenticating the customized module, if the secure element determines that the first and second authentication data are consistent with each other, establishing a secure communication link between the customized module and the secure element, by using the first or second authentication data, the non-secure device transmitting a command to the secure element, for an application installed in the secure element, and the secure element executing the command only if the command is sent via the secure communication link.

Method for providing a secure service

An integrated circuit including a multiplication function configured to execute a multiplication operation of two binary words x and y including a plurality of basic multiplication steps of components xi of word x by components yj of word y is described. The multiplication function of the integrated circuit is configured to execute two successive multiplications by modifying, in a random or pseudo-random manner, an order in which the basic multiplication steps of components xi by components yj are executed.

Integrated circuit protected against horizontal side channel analysis

A process for testing an integrated circuit includes collecting a set of points of a physical property while the integrated circuit is executing a multiplication, dividing the set of points into a plurality subsets of lateral points, calculating an estimation of the value of the physical property for each subset, and applying to the subset of lateral points a step of horizontal transversal statistical processing by using the estimations of the value of the physical property, to verify a hypothesis about the variables manipulated by the integrated circuit.

Process for testing the resistance of an integrated circuit to a side channel analysis

Growing community of inventors

Marseilles, France

Georges Gagnerot