Comment on "Security Proof for Cryptographic Protocols Based Only on Monogamy of Bell's Inequality Violations"

Abstract

Recently, Pawlowski [Phys. Rev. A 82, 032313 (2010)] claimed to have proven the security of a quantum key distribution by using only the monogamy of Bell's inequality violations. In the proof, however, he tacitly assumed that the eavesdropper's outcome is binary. The assumption cannot be justified because Eve's (eavesdropper's) power can only be limited by natural principle. We provide a counter-example for a step of the proof.

1 page, see also reply [PRA 85, 046302 (2012)]

References in corpus (1)

• Security proof for cryptographic protocols based only on the monogamy of Bell's inequality violations

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