2023/05/10 by Guillermo Currás-Lorenzo, Margarida Pereira, Currás-Lorenzo, Guillermo +7 · 5 citations
Computer Science · #Cryptographic Implementations and Security #FOS: Physical sciences #Physical Unclonable Functions (PUFs) and Hardware Security #Quantum Information and Cryptography #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2305.05930
openalex publication_date 2023/05/10 · openalex created_date 2023/05/12 · openalex updated_date 2026/08/03
Imperfect bit-and-basis 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 bit-and-basis encoding imperfections (including modulation flaws, side channels and inter-pulse correlations) while achieving significantly better performances than previous approaches and requiring only partial characterization.