Abstract
It is claimed by T. Nishioka et al. in [T. Nishioka, T. Hasegawa, H. Ishiziuka, K. Imafuku, H. Imai, Phys. Lett. A 327 (2004) 28-32] that the security of Y-00 is equivalent to that of a classical stream cipher. In this Letter 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.
Original language | English (US) |
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Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |
Volume | 346 |
Issue number | 1-3 |
DOIs |
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State | Published - Oct 10 2005 |
Funding
We would like to thank O. Hirota, W.Y. Hwang, and M. Ozawa for useful discussions. This work has been supported by DARPA under grant F30602-01-2-0528.
Keywords
- Quantum cryptography
ASJC Scopus subject areas
- General Physics and Astronomy