Distributed Relay Protocol for Probabilistic Information-Theoretic Security in a Randomly-Compromised Network

Details Distributed Relay Protocol for Probabilistic Information-Theoretic Security in a Randomly-Compromised Network Distributed Relay Protocol for Probabilistic Information-Theoretic Security in a Randomly-Compromised Network

2008-03-20

arxiv.org/abs/0803.2919v2

ICITS 2008, LNCS 5155, pp. 29-39, 2008

Physics

Quantum Physics

12 pages, 2 figures; added proof of verification sub-protocol, minor corrections

Scientific paper

10.1007/978-3-540-85093-9_4

We introduce a simple, practical approach with probabilistic information-theoretic security to mitigate one of quantum key distribution's major limitations: the short maximum transmission distance (~200 km) possible with present day technology. Our scheme uses classical secret sharing techniques to allow secure transmission over long distances through a network containing randomly-distributed compromised nodes. The protocol provides arbitrarily high confidence in the security of the protocol, with modest scaling of resource costs with improvement of the security parameter. Although some types of failure are undetectable, users can take preemptive measures to make the probability of such failures arbitrarily small.

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