期刊名称：International Journal of Multimedia and Ubiquitous Engineering
印刷版ISSN：1975-0080
出版年度：2014
卷号：9
期号：3
页码：235-248
出版社：SERSC
摘要：This paper presents a novel and efficient method to enhance the randomness of a Programmable Delay Line (PDL)-based True Random Number Generator (TRNG) by introducing Metastability-based Feedback scheme. As a principal tool for the security of sensor network, random number generator is one of important security primitives. At the CHES2011 conference, a new method of generating random numbers by inducing metastability using precise PDL and PI (proportional-Integral) control has been proposed. As the proposed TRNG could not achieve sufficient randomness on its own, a filtering scheme was used for higher entropy. Unfortunately, the intrinsic characteristics of filters made the throughput of the TRNG decrease by approximately 50\%. To preserve the original throughput and attain a high level of randomness, we present a simple solution that analyzes the probability of outputs and assign long time to metastable state. The proposed scheme shows high randomness in the NIST randomness test suite without any of the throughput loss caused by filtering
关键词：Metastability-based Feedback; Metastability; FPGA; True Random Number ;Generator; Programmable Delay Lines
