A Complete and Linear Physical Characterization Methodology for the Arbiter PUF Family.
Shahin Tajik, Enrico Dietz, Sven Frohmann, Helmar Dittrich, Dmitry Nedospasov, Clemens Helfmeier, Jean‐Pierre Seifert, Christian Boit, Heinz‐Wilhelm Hübers · 2015
Abstract. As intended by its name, Physically Unclonable Functions (PUFs) are considered as an ultimate solution to deal with insecure stor-age, hardware counterfeiting, and many other security problems. How-ever, many different successful attacks have already revealed vulnerabili-ties of certain digital intrinsic PUFs. This paper demonstrates that legacy arbiter PUF and its popular extended versions (i.e., Feed-forward and XOR-enhanced) can be completely and linearly characterized by means of photonic emission analysis. Our experimental setup is capable of mea-suring every PUF-internal delay with a resolution of 6 picoseconds. Due to this resolution we indeed require only the theoretical minimum number of linear independent equations (i.e. physical measurements) to directly solve the underlying inhomogeneous linear system. Moreover, it is not required to know the actual PUF responses for our physical delay extrac-tion. We present our practical results for an arbiter PUF implementation on a Complex Programmable Logic Device (CPLD) manufactured with a