Laser-induced fault effects in security-dedicated circuits

Lasers have become one of the most efficient means to attack secure integrated systems. Actual faults or errors induced in the system depend on many parameters, including the circuit technology and the laser characteristics. Understanding the physical effects is mandatory to correctly evaluate during the design flow the potential consequences of a laser-based attack and implement efficient counter-measures. This paper presents results obtained within the LIESSE project, aiming at defining a comprehensive approach for designers. Outcomes include the definition of fault/error models at several levels of abstraction, specific CAD tools using these models and new counter-measures well-suited to thwart laser-based attacks. Actual measures on components manufactured in the new 28 nm FDSOI technology are also presented.