This article is cited in 3 papers

MISCELLANEOUS

The role of causality in ensuring the ultimate security of relativistic quantum cryptography

S. N. Molotkov, S. S. Nazin

Institute of Solid State Physics, Russian Academy of Sciences

Abstract: One of the central points of quantum information theory is the problem of ultimate security of quantum cryptography; i.e., the security that is due only to the fundamental laws of nature rather than to technical restrictions. It is shown that a relativistic quantum cryptosystem proposed in this paper is ultimately secure against any eavesdropping attempts. The application of relativistic causality makes it possible to simply prove the security of the cryptosystem. Moreover, because the scheme does not involve collective measurements and quantum codes, it can be experimentally implemented even at the current level of optical fiber technologies.

PACS: 03.65.Bz, 42.50.Dv, 89.70.+c

Received: 15.05.2001

 English version: Journal of Experimental and Theoretical Physics Letters, 2001, 73:12, 682–687

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