International Association for Cryptologic Research (IACR)
Abstract
Similar to digital circuits, analog and mixed-signal (AMS) circuits are also susceptible to supply-chain attacks such as piracy, overproduction, and Trojan insertion. However, unlike digital circuits,
supply-chain security of AMS circuits is less explored. In this work,
we propose to perform “logic locking” on digital section of the AMS
circuits. The idea is to make the analog design intentionally suffer
from the effects of process variations, which impede the operation of the circuit. Only on applying the correct key, the effect of process
variations are mitigated, and the analog circuit performs as desired.
We provide the theoretical guarantees of the security of the circuit,
and along with simulation results for the band-pass filter, low-noise
amplifier, and low-dropout regulator, we also show experimental
results of our technique on a band-pass filter
