Title :
RO PUF design in FPGAs with new comparison strategies
Author :
Weiqiang Liu ; Yifei Yu ; Chenghua Wang ; Yijun Cui ; O´Neill, Maire
Author_Institution :
Key Lab. of Radar Imaging & Microwave Photonics, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A Physical Unclonable Function (PUF) can be used to provide authentication of devices by producing die-unique responses. In PUFs based on ring oscillators (ROs), the responses are derived from the oscillation frequencies of the ROs. However, RO PUFs can be vulnerable to attack due to the frequency distribution characteristics of the RO arrays. In this paper, in order to improve the design of RO PUFs for FPGA devices, the frequencies of RO arrays implemented on a large number of FPGA chips are statistically analyzed. Three RO frequency distribution (ROFD) characteristics are observed and discussed. Based on these ROFD characteristics, two RO comparison strategies are proposed that can be used to improve the design of RO PUFs. It is found that the symmetrical RO comparison strategy has the highest entropy density.
Keywords :
copy protection; entropy; field programmable gate arrays; logic design; security of data; FPGA chips; FPGA device; RO PUF design; RO frequency distribution; ROFD; device authentication; die-unique responses; ring oscillator physical unclonable function; Authentication; Entropy; Field programmable gate arrays; Radiation detectors; Ring oscillators; Physical unclonable function; RO PUF; comparison strategies; entropy density;
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7168574
