Overview of PUFs and Emerging Chaotic Structures

We present an abbreviated survey of common Physically Unclonable Function (PUF) structures, and highlight two emerging chaotic structures, targeted towards application-driven practitioners who need reliable generation of device specific values. Interestingly, chaotic PUF structures output entropic values over successive iterations. We also outline three distinct PUF use cases and discuss well-suited electronic structures for each case. We discuss security in limited cases and summarize suitable implementation targets, aspects affecting reliability, and notional generation rates. Altogether, this work summarizes key concepts about PUF structures in an application-driven context to aid both designers and users of these devices in the broader security community.