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Statistical Evaluation of a Superconductive Physical Random Number Generator
Tatsuro SUGIURA Yuki YAMANASHI Nobuyuki YOSHIKAWA
Publication
IEICE TRANSACTIONS on Electronics
Vol.E93C
No.4
pp.453457 Publication Date: 2010/04/01 Online ISSN: 17451353
DOI: 10.1587/transele.E93.C.453 Print ISSN: 09168516 Type of Manuscript: Special Section PAPER (Special Section on Frontiers of Superconductive Electronics) Category: Digital Applications Keyword: singlefluxquantum circuit, random number, Josephson junction, comparator,
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Summary:
A physical random number generator, which generates truly random number trains by using the randomness of physical phenomena, is widely used in the field of cryptographic applications. We have developed an ultra highspeed superconductive physical random number generator that can generate random numbers at a frequency of more than 10 GHz by utilizing the highspeed operation and highsensitivity of superconductive integrated circuits. In this study, we have statistically evaluated the quality of the random number trains generated by the superconductive physical random number generator. The performances of the statistical tests were based on a test method provided by National Institute of Standards and Technology (NIST). These statistical tests comprised several fundamental tests that were performed to evaluate the random number trains for their utilization in practical cryptographic applications. We have generated 230 random number trains consisting of 20,000bits by using the superconductive physical random number generator fabricated by the SRL 2.5 kA/cm^{2} Nb standard process. The generated random number trains passed all the fundamental statistical tests. This result indicates that the superconductive random number generator can be sufficiently utilized in practical applications.

