Physically Unclonable Functions

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Physically unclonable functions (PUFs) are groundbreaking physical security primitives that generate unique, instance-specific measurements of physical objects, akin to biometrics for humans. They securely produce and store secrets, enabling the establishment of an information security system's physical implementation. This work explores PUFs comprehensively, detailing their various physical constructions, algorithmic and physical properties, and deployment techniques in security applications. The author begins with an extensive overview and classification of PUF constructions, emphasizing intrinsic PUFs, identifying subclasses, implementation properties, and design techniques that convert submicroscopic physical distinctions into observable digital responses. He articulates the beneficial qualities of PUFs and defines their key properties, alongside a formal framework for their deployment in cryptographic contexts. The author also describes a silicon test platform featuring different intrinsic PUF structures to objectively evaluate their reliability, uniqueness, and unpredictability through experimental data. Later chapters cover PUF-based entity identification, authentication, and secure key generation, proposing practical schemes and metrics for assessing PUF constructions. Finally, a fully functional prototype of a PUF-based cryptographic key generator is presented, showcasing the advantages of PUFs and the efficiency of t