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Journal of Physics A Mathematical and General

Reply to comments on 'On a proposed new test of Heisenberg's principle'

M C Robinson

Published Oct 1, 1982• 1 citation
Publisher

Abstract

It is shown that the claims of Home and Sengupta (1981) and of Singh (1981) to have discovered fallacies in the author's analysis of a proposed, technically feasible test of Heisenberg's uncertainty principle are based on misunderstandings.
DOI
10.1088/0305-4470/15/10/040

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Comments on 'On a proposed new test of Heisenberg's principle'

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The authors point out a logical fallacy in Robinson's analysis (ibid., vol.13, p.877, 1980) of a thought experiment purporting to show violation of Heisenberg's uncertainty principle. The real problem concerning the interpretation of Heisenberg's principle is precisely stated.

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Reply to comment on Y-00 quantum secure communication protocol

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In 2000, an attractive new quantum cryptography was discovered by H.P.Yuen, which can realize secure communication with high speeds and at long distance by conventional optical devices. Recently, a criticism of the Yuen protocol, so called Y-00, was made by Nishioka, and Imai group(Mitsubishi and University of Tokyo), and they claimed Y-00 is essentially a classical stream cipher. This paper shows that the claim is incorrect. In particular, it is shown that the relation $l_i=r_i\oplus \tilde{k}_i$, which is their basis for attack, has no essential role for any security analysis. In addition, we give a brief introduction of the general logic for the security of Y-00 as direct encryption and also for key generation. Several industries have started to make a test-bed of Y-00 for digital optical fiber highway, following Kumar's leading work. We hope that this discussion encourages experimental works which realize a secure communication against quantum computer and quantum attacks based on physical principle.

arXiv:quant-ph/0312029•Dec 3, 2003•0 citations
In 2000, an attractive new quantum cryptography was discovered by H.P.Yuen, which can realize secure communication with high speeds and at long distance by conventional optical devices. Recently, a criticism of the Yuen protocol, so called Y-00, was made by Nishioka, and Imai group(Mitsubishi and University of Tokyo), and they claimed Y-00 is essentially a classical stream cipher. This paper shows that the claim is incorrect. In particular, it is shown that the relation li=ri⊕k~il_i=r_i\oplus \tilde{k}_ili​=ri​⊕k~i​, which is their basis for attack, has no essential role for any security analysis. In addition, we give a brief introduction of the general logic for the security of Y-00 as direct encryption and also for key generation. Several industries have started to make a test-bed of Y-00 for digital optical fiber highway, following Kumar's leading work. We hope that this discussion encourages experimental works which realize a secure communication against quantum computer and quantum attacks based on physical principle.