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Title A Single-ring-oscillator based True-random-number-generator with 3-edges Collapse
Authors (Eunhwan Kim) ; (Jae-Joon Kim)
DOI https://doi.org/10.5573/JSTS.2023.23.6.396
Page pp.396-402
ISSN 1598-1657
Keywords Cryptography; frequency collapse; hardware security; ring oscillator (RO); true random number generator (TRNG)
Abstract This paper presents an all-digital ring oscillator (RO) based true random number generator (TRNG) that harvests entropy as a jitter. The proposed TRNG constructs upon the collapsing RO-based structure and exhibits high immunity against external power attacks. This approach senses the 3-edge collapse point using a single RO without a reference RO, reducing both area and energy consumption. A prototype chip fabricated using 65 nm technology operates between 1.08 V and 1.44 V, occupying an area of 702 ?m2. The randomness of the TRNG passed the NIST randomness test up to 2 LSB when the external power attack was below 300 mVPP. This work demonstrates a throughput of 7.1 Mbits/s at 1.2 V and provides an efficiency of 40.93 Mbit/mJ at 1.08 V.