Security of high-speed quantum key distribution with imperfect sources

• URL: http://arxiv.org/abs/2305.05930v3
• Date: Fri, 02 May 2025 19:05:56 GMT
• Title: Security of high-speed quantum key distribution with imperfect sources
• Authors: Guillermo Currás-Lorenzo, Margarida Pereira, Go Kato, Marcos Curty, Kiyoshi Tamaki,
• Abstract summary: Imperfect encoders compromise the security of quantum key distribution (QKD) systems via modulation flaws, side channels and inter-pulse correlations.<n>Here, we present a finite-key security proof approach against coherent attacks that incorporates general encoding imperfections while achieving significantly better performances and requiring only partial characterization.
• Score: 1.2815904071470707
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Imperfect encoders compromise the security of quantum key distribution (QKD) systems via modulation flaws, side channels and inter-pulse correlations, which invalidate standard security proofs. Existing results addressing such imperfections suffer from critical limitations: they either consider only specific flaws, offer an unreasonably poor performance, or require the protocol to be run very slowly. Here, we present a finite-key security proof approach against coherent attacks that incorporates general encoding imperfections while achieving significantly better performances and requiring only partial characterization.

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