Physics – Quantum Physics
Scientific paper
2005-09-13
Physics
Quantum Physics
Submitted to Phys. Lett. A
Scientific paper
Nishioka et al claim in [1], elaborating on their earlier paper [2], that the direct encryption scheme called Y-00 [3,4] is equivalent to a classical non-random additive stream cipher, and thus offers no more security than the latter. In this paper, we show that this claim is false and that Y-00 may be considered equivalent to a \emph{random} cipher. We explain why a random cipher provides additional security compared to its nonrandom counterpart. Some criticisms in [1] on the use of Y-00 for key generation are also briefly responded to.
Corndorf Eric
Kumar Prem
Nair Ranjith
Yuen Horace P.
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