Paper Info
Title
A 108 F<sup>2</sup>/Bit Fully Reconfigurable RRAM PUF Based on Truly Random Dynamic Entropy of Jitter Noise
Abstract
In this paper, we present a fully reconfigurable resistive random access memory (RRAM) physical unclonable function (PUF) based on the truly random dynamic entropy of the ubiquitous jitter noise, which is intrinsically different from most previously demonstrated PUF implementations with semiconductor fabrication's process variation as the static entropy source. In addition, the proposed RRAM PUF is operated by configuring the mainstream RRAM cells to either high resistance state (for `1') or low resistance state (for `0'), according to the customized ring oscillator (RO) true random number generator's digital output that is determined by the random jitter noise. By completely removing the need of dedicated split resistance circuitry (SRC) in existing RRAM PUFs, the proposed implementation is fully compatible with the SET/RESET operations of the RRAM array for mainstream memory applications, leading to minimized design overhead and enhanced reliability without SRC-caused error bits. Fabricated using 130 nm standard complementarymetal-oxide-semiconductor (CMOS) process plus post-processing dedicated to the RRAM devices, the proposed RRAM PUF cell features an ultra-compact footprint of 1.82 μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> (i.e., 108 F <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ), which is capable of generating ~10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7</sup> PUF bits per cell due to the time-variant property of jitter noise and the full reconfigurability of the RRAM PUF. This significantly innovates all the previous weak PUF implementations based on the static entropy source of process variation, where the maximum bit number per PUF cell is always limited and fixed after the chip fabrication. Meanwhile, ultra-low native unstable bits of 0.28% and bit error rate (BER) per 10°C of 0.03% can be achieved for the fabricated RRAM PUF. Moreover, by passing the widely-adopted bias test, National Institute of Standards and Technology (NIST) test and autocorrelation function (ACF) test under various VT conditions, the true randomness of the customized RO TRNG' dynamic entropy is validated using 65 nm standard CMOS process. Compared with the state-of-the-art weak PUF implementations, the native unstable bits is improved by 5.36× and the BER per 10°C is improved by 4×, even under the widest operating temperature range from -50°C to 150°C.
Year
DOI
Venue
2020
10.1109/TCSI.2020.3008407
IEEE Transactions on Circuits and Systems I: Regular Papers
Keywords
DocType
Volume
Physical unclonable function,resistive random access memory,true random number generator,dynamic entropy source,full reconfigurability,high reliability
Journal
67
Issue
ISSN
Citations 
11
1549-8328
2
PageRank 
References 
Authors
0.36
0
6
Name
Order
Citations
PageRank
Qiang Zhao141.75
Wenhan Zheng231.39
Xiaojin Zhao345.48
Yuan Cao45414.46
Feng Zhang522825.71
Man-Kay Law67219.83