SACReD: An Attack Framework on SAC Resistant Delay-PUFs leveraging Bias and Reliability Factors
Hosted in Virtual Platform
Hardware Security: Attack and Defense
DescriptionThe S-PUF and Sn-PUF designs are one of the contemporary candidates of the delay PUF family that exhibit two notable attributes: (i) It is guided by theoretical analysis of the SAC property and not by any ad-hoc choices (ii) It has very good reliability property due to the Maiorana-McFarland Bent Function. This makes Sn-PUF an interesting target from an attacker's point of view. In this work, we testify that a novel reliability-based modelling attack can be launched on this architecture. We leverage the bias inherently introduced by the design and achieve significant modelling accuracy with a realistic number of CRPs.