Ricerc@Sapienza

Security of sensible data for ultraconstrained IoT smart devices is one of the most challenging task in modern design. The needs of CPA-resistant cryptographic devices has to deal with the demanding requirements of small area and small impact on the overall power consumption. In this work, a novel current-mode feedback suppressor as on-chip analog-level CPA countermeasure is proposed. It aims to suppress differences in power consumption due to data-dependency of CMOS cryptographic devices, in order to counteract CPA attacks.

The static power consumption in modern integrated circuits has become a critical standpoint in side-channel analysis. As it has been widely demonstrated in the technical literature, it is possible to extract secret information from a cryptographic circuit by means of static current measurements. Static and dynamic power analysis require different measurement procedures, due to physical reasons.