High error-rate quantum key distribution for long-distance communication
arXiv:0901.3909 · doi:10.1088/1367-2630/11/6/063043
Abstract
In the original BB84 protocol by Bennett and Brassard, an eavesdropper is detected because his attempts to intercept information result in a quantum bit error rate (QBER) of at least 25%. Here we design an alternative quantum key distribution protocol, where Alice and Bob use two mutually unbiased bases with one of them encoding a "0" and the other one encoding a "1." The security of the scheme is due to a minimum index transmission error rate (ITER) introduced by an eavesdropper which increases significantly for higher-dimensional photon states. This allows for more noise in the transmission line, thereby increasing the possible distance between Alice and Bob without the need for intermediate nodes.
17 pages, 3 figures, 4 tables, discussion of QBER added
References in corpus (8)
- Device-independent security of quantum cryptography against collective attacks
- Quantum teleportation between light and matter
- Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
- Experimental demonstration of a BDCZ quantum repeater node
- Long distance decoy state quantum key distribution in optical fiber
- Secrecy extraction from no-signalling correlations
- High speed coherent one-way quantum key distribution prototype
- High error-rate quantum key distribution for long-distance communication