Uniformity Adjustment of Delay-Based Physical Unclonable Function: Modeling and Analysis

We discuss a theoretical model to evaluate the source of entropy from a mathematical point of view targeting optimized intrinsic security mechanisms implemented by Physical Unclonable Functions (PUFs). The results develop a profitable design tool that can address the most crucial model parameters suitable to adjust the system uniformity without imposing additional electronic gates. The study pursues the theoretical approach by a low-complexity CMOS circuit solution implementing the mathematical models aiming at proposing methodical approaches for implementing security mechanisms embedded in hardware.