True random number generation using CMOS Boolean chaotic oscillator
Myung Hwan Park, John Rodgers, Daniel Perry Lathrop · Microelectronics Journal · 2015
We report on a random number generator whose randomness derives from a Boolean chaotic oscillator, designed and fabricated as an integrated circuit. The underlying physics of chaotic dynamics in the Boolean chaotic oscillator is verified by time domain analysis , frequency domain analysis , and computation of Lyapunov exponents . To test the hypothesis physically, a discrete Boolean chaotic oscillator is implemented using commercial chips on printed circuit boards . Using a CMOS 0.35 μm process, we build a CMOS Boolean chaotic oscillator, which consists of a core chaotic oscillator and a source follower buffer. The quality of the measured bit sequences makes a suitable randomness source, and its property is analyzed using NIST standard statistical tests after subsequent post-processings. This circuit requires 0.087 nJ for a generation of single random bit with the chip area of 0.057 mm 2 .