Miniaturized and Highly Randomized True Random Bit Generator

Abstract

This paper introduces true random bit generator (TRBG) with a higher quality of randomness based on chaos circuit and unpredictable linear feedback shift register (LFSR). This miniaturized true random bit generator made of two stages of randomness. The first stage produces the continuous random variable, and the second stage provides the Metastability to the circuit. The chaos circuit gives immunity from the side channel attack, and the circuit has Metastability for every events of bit generation and also ensures a 1 Mbps bit rate data output. This generator can be used as the seed generator for any encryption design (like image encryption), the true random generator is designed for the cheaper devices like complex programmable logic devices (CPLDs) and field programmable gate arrays (FPGAs) for any lightweight encryption design. The National Institute of Standard and Technology (NIST) tests of randomness are applied for testing the randomness of TRBG.