arXiv:quant-ph/9511025AbstractReferencesReviewsResources
Quantum Cryptography in Noisy Channels
Published 1995-11-20Version 1
We provide a complete proof of the security of quantum cryptography against any eavesdropping attack including coherent measurements even in the presence of noise. Polarization-based cryptographic schemes are shown to be equivalent to EPR-based schemes. We also show that the performance of a noisy channel approaches that of a noiseless one as the error rate tends to zero. (i.e., the secrecy capacity $C_s (\epsilon) \to C_s (0)$ as $\epsilon \to 0$.) One implication of our results is that one can {\it double} the efficiency of a most well-known quantum cryptographic scheme proposed by Bennett and Brassard simply by assigning vastly different probabilities to the two conjugate bases.
Comments: 22 pages, REVTEX
Categories: quant-ph
Related articles: Most relevant | Search more
Optimal eavesdropping in quantum cryptography with six states
Security of quantum cryptography using balanced homodyne detection
arXiv:quant-ph/0408179 (Published 2004-08-30)
Exploiting the randomness of the measurement basis in quantum cryptography: Secure Quantum Key Growing without Privacy Amplification