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arxiv: quant-ph/0407067 · v2 · submitted 2004-07-08 · 🪐 quant-ph

Security of Y-00 and similar quantum cryptographic protocols

classification 🪐 quant-ph
keywords y-00securityprotocolscipherclaimclaimedclarifiedclassical
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It is claimed in Phys. Lett. A by T. Nishioka et. al. 327 (2004) 28-32, that the security of Y-00 is equivalent to that of a classical stream cipher. In this paper it is shown that the claim is false in either the use of Y-00 for direct encryption or key generation, in all the parameter ranges it is supposed to operate including those of the experiments reported thus far. The security of Y-00 type protocols is clarified.

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