Silicon physical random functions

Controlled Physical Random Functions

“…By exploiting statistical variations in the delays of devices (gates and wires) within the IC, we can create a manufacturer resistant PUF [GCvDD02]. Manufactured IC's, from either the same lot or wafer have inherent delay variations.…”

“…PUFs can be implemented in different ways and can be used in authenticated identification applications [GCvDD02,Rav01]. In this paper, we introduce Controlled Physical Random Functions (CPUFs) which are PUFs that can only be accessed via an algorithm that is physically bound to the PUF in an inseparable way.…”

User Centric Security Model for Tamper-Resistant Devices

“…Another potential protection strategy is to utilise Physical Unclonable Functions (PUFs) [116] to provide hardware validation. It is di cult to nd a single and consistent denition of PUF in the literature [117].…”

“…It is di cult to nd a single and consistent denition of PUF in the literature [117]. However, a property description de nition of the PUF is provided by Gassend et al in [116]. Usual applications of the PUF described in the literature are in anti-counterfeiting [118], Intellectual Property protection [119] [121], tamper-evident hardware [122], hardware based cryptography [60,123] [125] and secure/trusted processors [126].…”

“…There are several possibilities for a self-test mechanism in a UCTD including using active (intelligent) shield/mesh [115], the Known Answer Test (KAT) [113], and the Physical Unclonable Function (PUF) [116].…”