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Conference on Lasers and Electro-Optics

Experimental Demonstration of Quantum Deliberate Signal Randomization for Y-00 Quantum Noise Stream Cipher

Fumio Futami, Ken Tanizawa, Kentaro Kato

Published Jan 1, 2022• 4 citations
Publisher

Abstract

Deliberate signal randomization (DSR) driven by quantum random numbers is proposed for enhancing security. PSK Y-00 cipher with the quantum DSR is demonstrated at 5 Gbit/s, indicating secure transmission is achievable at high optical powers.
DOI
10.1364/cleo_at.2022.jw3b.107

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In a series of articles concerned with quantum stream cipher by Y-00 protocol on this conference, we have claimed that the quantum stream cipher has a pretty good security against several concrete attacks. On the other hand, it has been pointed out that one can improve the security level by using various additional randomization techniques. In this paper, we will show some concrete randomization techniques for quantum stream cipher. First we will sketch the framework of the deliberate signal randomization (DSR) that is realized by randomizing the signals deliberately with true-random numbers or with pseud-random numbers generated by a secret key. Secondly, we will consider about the deliberate error randomization (DER) by using concrete models. It will be shown that these randomization techniques enhance the security level of the quantum stream cipher.