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FPGA-Based True Random Number Generation Using Programmable Delays in Oscillator-Rings


Scalable and Secure Big Data I

3D Reconstruction in Canonical
Abstract


True random number generators play a fundamental role in cryptographic systems. This paper presents a new and efficient method to generate true random numbers on field programmable gate array by utilizing the random jitter of freerunning oscillators as a source of randomness. The free-running oscillator rings incorporate programmable delay lines to generate large variation of the oscillations and to introduce jitter in the generated ring oscillators clocks. The main advantage of the proposed true random number generator utilizing programmable delay lines is to reduce correlation between several equal length oscillator rings, and thus improve the randomness qualities. In addition, a Von Neumann corrector as post-processor is employed to remove any bias in the output bit sequence. The validation of the proposed approach is demonstrated on Xilinx Spartan-3A FPGAs. The proposed true random number generator occupies 528 slices, achieves 6 Mbps throughput with 0.999 per bit entropy rate, and passes all the National Institute of Standards and Technology (NIST) statistical tests.

KeyWords
TRNG, FPGA, Ring Oscillators, Entropy, PDLs.



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