منابع مشابه
Security of quantum key distribution with bit and basis dependent detector flaws
We consider the security of the Bennett-Brassard 1984 (BB84) protocol for Quantum Key Distribution (QKD), in the presence of bit and basis dependent detector flaws. We suggest a powerful attack that can be used in systems with detector efficiency mismatch, even if the detector assignments are chosen randomly by Bob. A security proof is provided, valid for any basis dependent, linear optical imp...
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Decoherence and loss will limit the practicality of quantum cryptography and computing unless successful error correction techniques are developed. To this end, we have discovered a new scheme for perfectly detecting and rejecting the error caused by loss (amplitude damping to a reservoir at T 0), based on using a dual-rail representation of a quantum bit. This is possible because (1) balance...
متن کاملQuantum bit string commitment.
A bit string commitment protocol securely commits N classical bits so that the recipient can extract only M<N bits of information about the string. Classical reasoning suggests that bit string commitment implies bit commitment and hence, given the Mayers-Lo-Chau theorem, that nonrelativistic quantum bit string commitment is impossible. Not so: there exist nonrelativistic quantum bit string comm...
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This paper is reversing the current belief on Quantum Bit Commitment. Several papers have claimed and given a formal proof that quantum bit commitment is impossible. Nevertheless, the hypotheses of the formal mathematical model are too restrictive and do not exhaustively reflect the original definition of the problem. They share the same unnecessary restriction that the responsibility of hiding...
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ژورنال
عنوان ژورنال: Journal of Experimental and Theoretical Physics Letters
سال: 2004
ISSN: 0021-3640,1090-6487
DOI: 10.1134/1.1776240