Quantum Information Processing

Security of ping-pong protocol based on pairs of completely entangled qudits

P. Zawadzki

Published Sep 21, 2011• 30 citations

Abstract

Quantum secure direct communication protocols offer confidential transmission of classic information over quantum channel without prior key agreement. The ping-pong based protocols provide asymptotic security and detailed analysis of security level provided by each variant of the protocol is required. The paper presents a general method of calculation of the eavesdropped information as a function of the attack detection probability. The method is applied to the ping-pong protocol based on completely entangled pairs of qudits. The upper and lower bounds on the amount of the leaked information and eavesdropping detection probability are provided.

DOI: 10.1007/s11128-011-0307-1

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