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Noise and Measurement Errors in a Practical Two-State Quantum Bit Commitment Protocol in Optical Fibers

Almeida, A. ; Loura, R. Loura ; André, P.S ; Pinto, A. N. ; Mateus, P. ; Paunkovic, N.

Noise and Measurement Errors in a Practical Two-State Quantum Bit Commitment Protocol in Optical Fibers, Proc Conf. on Quantum Cryptography - QCRYPT, Paris, France, Vol. 1, pp. 1 - 3, September, 2014.

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Abstract
We present a practical two-state quantum bit commitment protocol whose security is based on current technological limitations. Those limitations are the lack of stable long-term quantum memories and non-demolition measurements. Noise and measurements errors are analyzed, along with the protocol's security. Since perfect non-demolition measurements and quantum memories are unattainable, because in practice noise is inevitable, our protocol can be demonstrated as being unconditionally secure.