Integrated circuit design for physical unclonable function using differential amplifiers

Abstract

A physical unclonable function (PUF) based on process variations on silicon wafers is a very promising technology which finds various applications in identification and authentication, but only a few integrated circuits have been reported so far. As those circuits are vulnerable to power supply noises, switching noises and environmental variations, they lead to a reliability issue such as time-varying or metastable responses. To resolve this issue, this letter proposes a new integrated circuit design for PUFs using differential amplifiers. The feasibility of the proposed circuit has been theoretically analyzed and validated through HSPICE simulations for the previous and proposed circuits.

Design of security enhanced TPM chip against invasive physical attacks

“…The RSA module includes a 1024-bit PUF and a key generator, and the AES module includes a 128-bit PUF and a key generator. In the implemented TPM, PUFs based on symmetric amplifiers [8] are used. Because the size of each PUF cell is very small, about 2-3 gates, it can be included in the standard cell library.…”