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Quantum Information Processing

Asymptotic security analysis of teleportation-based quantum cryptography

  • 01-07-2020
Published in:
Authors
Diogo Lima
Gustavo Rigolin
Published in
Quantum Information Processing | Issue 7/2020

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Abstract

We prove that the teleportation-based quantum cryptography protocol presented in Gordon and Rigolin (Opt Commun 283:184, 2010), which is built using only orthogonal states encoding the classical bits that are teleported from Alice to Bob, is asymptotically secure against all types of individual and collective attacks. We then investigate modifications to that protocol leading to greater secret-key rates and to security against coherent attacks. In other words, we show an unconditional secure quantum key distribution protocol that does not need non-orthogonal quantum states to encode the bits of the secret key sent from Alice to Bob. We also revisit the security proof of the BB84 protocol by exploring the non-uniqueness of the Schmidt decomposition of its entanglement-based representation. This allows us to arrive at a secure transmission of the key for a slightly greater quantum bit error rate (quantum communication channel’s noise) when compared to its standard security analysis.

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previous article Entanglement purification of two-photon systems in multiple degrees of freedom
next article Finite-key security analysis of the 1-decoy state QKD protocol with a leaky intensity modulator
Title
Asymptotic security analysis of teleportation-based quantum cryptography
Authors
Diogo Lima
Gustavo Rigolin
Publication date
01-07-2020
Publisher
Springer US
Published in
Quantum Information Processing / Issue 7/2020
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-020-02701-w
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