Method for detecting an attempted attack, recording medium, and security processor for said method

摘要

This method in which an attempt to attack a security processor is detected by the security processor itself comprises:
measurements (50) of several different events occurring independently of one another in the absence of attack attempts,:building (52) the value of at least one attack indicator as a function of at least one index of concomitance between at least two different events measured, the index of concomitance representing the temporal proximity between the two different events measured, anddetecting (54) an attack attempt if the value of the attack indicator crosses a predetermined threshold.

主权项

1. A method for detecting, by a security processor, an attempt to attack said security processor, said method comprising measuring events occurring independently of each other in absence of attack attempts; obtaining at least one index of concomitance between at least two measurements by multiplying said measurements by one another, said at least one index of concomitance representing a temporal proximity between at least two different measured events, building a value of at least one attack indicator as a function of at least said at least one index of concomitance between at least two different measured events, and detecting an attack attempt if said value of said at least one attack indicator crosses a predetermined threshold.