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Material Science Research India

Security Quantum Key Distribution in Quantum Theory Using the Theory of Bell

Yadollah Farahmand, Zabialah Heidarnezhad, Х. Х. Муминов

Published Sep 29, 2016• 0 citations
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We show that monogamy of Bell's inequality violations, which is strictly weaker condition than the no-signaling principle is enough to prove security of quantum key distribution. We derive our results for a whole class of monogamy constraints and generalize our results to any theory that communicating parties may have access to. Some of these theories do not respect the no-signaling principle yet still allow for secure communication. This proves that no signaling is only a sufficient condition for the possibility of secure communication, but not the necessary one. We also present some new qualitative results concerning the security of existing quantum key distribution protocols.