Secure Quantum Pattern Communication
Cillian Harney, Stefano Pirandola

TL;DR
This paper introduces a novel multi-mode quantum encoding scheme called quantum pattern encoding for CV quantum communication, enhancing encoding complexity and analyzing security against quantum eavesdroppers.
Contribution
It presents a new quantum pattern encoding method for CV quantum communication, enabling complex, non-uniform encoding schemes and analyzing their security implications.
Findings
Increased encoding complexity through pattern-based schemes.
Formulation of new attack models for quantum eavesdroppers.
Potential for improved secure communication rates.
Abstract
We propose a multi-mode modulation scheme for Continuous Variable (CV) quantum communications, which we call quantum pattern encoding. In this setting, classical information can be encoded into multi-mode patterns of discretely-modulated coherent states, which form instances of a communicable image space. Communicators can devise arbitrarily complex encoding schemes which are degenerate and highly non-uniform, such that communication is likened to the task of pattern recognition. We explore initial communication schemes that exploit these techniques, and which lead to an increased encoding complexity. We discuss the impact that this has on the role of a near-term quantum eavesdropper; formulating new, realistic classes of attacks and secure communication rates.
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