A Novel Technique of Configurable Ring Oscillator for Physical Unclonable Functions
نویسندگان
چکیده
The Silicon Physical Unclonable Function (SPUF) was first introduced by Devadas. The silicon PUF works on the basis of the variations in delays present in the gates as well as wires. The ring oscillator PUF is one of the implementation of SPUF. The ring oscillator requires one pair of ring oscillators for each output bit. So for collecting more number of output bits to acquire safe security level, more number of ring oscillators are required. This problem can be solved by using configurable PUF. Configurable ring oscillator PUF was introduced by Maiti to improve reliability of basic ring oscillator PUF. In this PUF, the ring oscillator is fitted in configurable logic block (CLB) by using look up tables (LUT) and dedicated multiplexers. In this paper the configurable ring oscillator analysis is presented. The hard macro of configurable ring oscillator is implemented for identical placement and outing inside CLB. The configurable logic block gives better results than simple ring oscillator PUF.
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