A Novel Modelled True Random Binary Number Generator for Key Stream Generation in Cryptographic Applications

In this paper, a modified double scroll chaotic attractor circuit, which is employed as a True Random Binary Number Generator (TRBNG), is presented for use as a key source in cryptographic applications. The double scroll attractor is modelled on Chua's circuit for nonlinear operation leading to chaotic behaviour. Previous reported versions of this circuit used von Neumann's deskewing algorithm and optimal voltage threshold settings for random number generation. The binary sequence obtained from this structure passed the FIPS set of tests, but this type of generator will not pass the NIST Test Suite for true randomness owing to some residual structural correlation in the output sequence which is essential for consideration as a cryptographic module in the Advanced Encryption Standard (AES).