μRNG: A 300–950mV 323Gbps/W all-digital full-entropy true random number generator in 14nm FinFET CMOS

Abstract

An all-digital full-entropy True Random Number Generator (TRNG) with measured 1.3GHz operation and total power consumption of 1.5mW at 0.75V, 25oC is fabricated in 14nm FinFET CMOS. Three independent self-calibrating entropy sources, coupled with pre-extraction correlation suppressors and a real-time BIW extractor enable ultra-low energy consumption of 3pJ/bit, while generating cryptographic-quality keys with measured Shannon entropy up to 0.99999999995 and lower-bound min-entropy >0.99. The 100% digital design enables a compact layout occupying 1088μm2, with scalable operation down to 300mV, while passing all NIST statistical randomness tests.