Security of a High Dimensional Two-Way Quantum Key Distribution Protocol

• URL: http://arxiv.org/abs/2203.02989v1
• Date: Sun, 6 Mar 2022 15:36:54 GMT
• Title: Security of a High Dimensional Two-Way Quantum Key Distribution Protocol
• Authors: Walter O. Krawec
• Abstract summary: Two-way quantum key distribution protocols utilize bi-directional quantum communication to establish a shared secret key. We investigate a high-dimensional variant of the Ping Pong protocol and perform an information theoretic security analysis in the finite-key setting.
• Score: 1.827510863075184
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Two-way quantum key distribution protocols utilize bi-directional quantum communication to establish a shared secret key. Due to the increased attack surface, security analyses remain challenging. Here we investigate a high-dimensional variant of the Ping Pong protocol and perform an information theoretic security analysis in the finite-key setting. Our methods may be broadly applicable to other QKD protocols, especially those relying on two-way channels. Along the way, we show some fascinating benefits to high-dimensional quantum states applied to two-way quantum communication.

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