Impact of Orientation on the Bias of SRAM-Based PUFs
Zain Ul Abideen, Rui Wang, Tiago Perez, Geert-Jan Schrijen, Samuel Pagliarini · IEEE Design and Test · 2023
PHYSICALLY UNCLONABLE Function (PUF) modules are a useful hardware security primitive due to their uniqueness, non-reproducible and unclonable features. Generally, a PUF is used for two applications: secret key generation for cryptographic use and/or device authentication/provenance of Integrated Circuits (ICs) [1]. PUFs exploit process variation (e.g., gate oxide thickness, size, and threshold voltage) that occurs naturally during the fabrication of ICs. Although ICs are fabricated from identical layouts, every transistor presents slightly random electric properties, which aid in generating a unique identity [2]. Importantly, these random properties cannot be replicated even if an adversary can access the full design. Thus it provides a unique advantage for anti-counterfeiting measures [3].