Muhammad Mubashir Khan et al 2009 New J. Phys. 11 063043 doi:10.1088/1367-2630/11/6/063043
High error-rate quantum key distribution for long-distance communication
Muhammad Mubashir Khan1,4, Michael Murphy2 and Almut Beige3
Show affiliationsIn 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 that 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.
- PACS
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03.67.Dd Quantum cryptography and communication security
84.40.Ua Telecommunications: signal transmission and processing; communication satellites
- Subjects
- Dates
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Issue 6 (June 2009)
Received 16 January 2009
Published 22 June 2009
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High error-rate quantum key distribution for long-distance communication
Muhammad Mubashir Khan et al 2009 New J. Phys. 11 063043
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