Patent ID: 8457919

Claim:
A process for testing an integrated circuit device, comprising: causing, by an execution component, the integrated circuit to execute a multiplication operation of two binary words x and y, the multiplication operation comprising splitting, by the integrated circuit, the binary words x and y into their respective components xi and yj, and performing, by the integrated circuit, a plurality of basic multiplication steps of the components xi of the word x by the components yj of the word y; measuring, by a measuring module, a physical property of the integrated circuit during the multiplication of the components, the physical property presenting variations that are representative of binary data switching within the integrated circuit; collecting, by the measuring module, a set of points of the physical property; dividing, by a data processing component, the collected set of points of the physical property into a plurality of subsets of lateral points, each subset of lateral points corresponding to a basic multiplication operation of the component xi of rank i of the word x by the component yj of rank j of the word y; forming, by the data processing component, at least one general hypothesis about at least one of a value of the word x and a value of the word y; for each subset of lateral points, forming, by the data processing component, a particular hypothesis about a value of at least one of the component xi and of the component yj linked to the general hypothesis; for each subset of lateral points, calculating, by the data processing component, an estimation of the value of the physical property that is a function of the particular hypothesis, and attributing the estimation to the subset of lateral points and to the points of the subset of lateral points; and applying, by the data processing component, to the subsets of lateral points a step of horizontal transversal statistical processing using the estimations of the value of the physical property associated therewith, to determine whether the general hypothesis is correct.