@inproceedings{15f53df41d92456cb1cd2c642de797a7,
title = "On Entropy and Bit Patterns of Ring Oscillator Jitter",
abstract = "Thermal jitter (phase noise) from a free-running ring oscillator is a common, easily implementable physical randomness source in True Random Number Generators (TRNGs). We show how to evaluate entropy, autocorrelation, and bit pattern distributions of ring oscillator noise sources, even with low jitter levels or some bias. Entropy justification is required in NIST 800-90B and AIS-31 testing and for applications such as the RISC-V entropy source extension. Our numerical evaluation algorithms outperform Monte Carlo simulations in speed and accuracy. We also propose a new lower bound estimation formula for the entropy of ring oscillator sources which applies more generally than previous ones.",
keywords = "AIS-31, Entropy Source, NIST SP 800-90B, Random Numbers, Ring Oscillator, Stochastic Model",
author = "Saarinen, {Markku Juhani O.}",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 6th Asian Hardware Oriented Security and Trust Symposium, AsianHOST 2021 ; Conference date: 17-12-2021 Through 18-12-2021",
year = "2021",
doi = "10.1109/AsianHOST53231.2021.9699508",
language = "English",
series = "Proceedings of the 2021 Asian Hardware Oriented Security and Trust Symposium, AsianHOST 2021",
publisher = "IEEE",
booktitle = "Proceedings of the 2021 Asian Hardware Oriented Security and Trust Symposium, AsianHOST 2021",
address = "United States",
}