Abstract
This chapter presents a novel Physically Unclonable Function PUF called “Loop PUF” (LPUF) which has been studied specifically to be easy to design, lightweight and reliable. The LPUF principle is based on a loop of N controllable delay lines forming a unique ring oscillator. It offers a huge set of challenges as the identity extraction is performed by N measurements, whereas the extraction is made differentially for the other delay-based PUF. This property allows the designer to forge stronger challenge-response protocols or to generate more reliable internal keys. The LPUF concept has been designed and evaluated in ASIC 65 nm technology and in FPGA Virtex-5. The evaluation results show good properties of randomness and uniqueness. As the LPUF output is in integer format and can use numerous challenges, it provides a good base to enhance the steadiness and build reliable authentication protocols. This chapter presents an example of authentication primitive which is very steady in a large range of environmental conditions.
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Cherif, Z., Danger, JL., Lozac’h, F., Nguyen, P. (2015). Physically Unclonable Function: Principle, Design and Characterization of the Loop PUF. In: Candaele, B., Soudris, D., Anagnostopoulos, I. (eds) Trusted Computing for Embedded Systems. Springer, Cham. https://doi.org/10.1007/978-3-319-09420-5_6
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DOI: https://doi.org/10.1007/978-3-319-09420-5_6
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