Authentication protocol based on collective quantum steering

Abstract

It is well known that certain quantum correlations like quantum steering exhibit a monogamous relationship. In this paper, we exploit the asymmetric nature of quantum steering and show that there exist states which exhibit a polygamous correlation, known as collective correlation [He and Reid, Phys. Rev. Lett. 111, 250403 (2013)], where the state of one party, Alice, can be steered only by the joint effort of the other two parties, Bob and Charlie. As an example, we explicitly single out a particular set of $3$ qubit states which exhibit this polygamous relationship, known as collective steerability. We provide a recipe to identify the complete set of such states. We also provide a possible application of such states to an information theoretic task, termed as quantum key authentication (QKA) protocol. QKA can also be used in conjunction with other well known cryptography protocols to improve their security and we provide one such example with quantum private comparison (QPC).

arXiv comment6 pages, 1 figure, comments appreciated :)

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Cited by in corpus (5)

• Demonstrating shareability of multipartite Einstein-Podolsky-Rosen steering
• Full multipartite steering inseparability, genuine multipartite steering and monogamy for continuous variable systems
• Quantum thermodynamic advantage in work extraction from steerable quantum correlations
• No nonlocal advantage of quantum coherence beyond quantum instrumentality
• Scalable multiparty steering based on a single pair of entangled qubits