IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
A latch-latch composition of metastability-based true random number generator for Xilinx FPGAs
Naoki FujiedaShuichi Ichikawa
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JOURNALS FREE ACCESS

2018 Volume 15 Issue 10 Pages 20180386

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Abstract

Metastability of RS latches can be a source of entropy for true random number generators (TRNGs). This study presents a new composition of an RS latch using the latch functionality of storage elements of Xilinx FPGAs. Our TRNG is implemented as a soft macro, or RTL description with directives, which is easily integrated into other logic components. According to our evaluation with an Artix-7 FPGA (XC7A35T), our TRNG with 320 latches (716 LUTs and 974 registers) passed the NIST SP 800-22 test suite without post-processing. Also, our new TRNG presented a 2.3x better area-delay product than the existing design to pass the diehard test.

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© 2018 by The Institute of Electronics, Information and Communication Engineers
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