가우시안 극값성을 통한 1D 이산 변조 CV-QKD의 보안 경계

1D 이산 변조 CV-QKD의 보안 분석에 따르면, 가우시안 극값성은 이브(Eve)의 정보량을 체계적으로 과대평가하여 4개 상태 이상의 성상도에서는 안전한 키 추출이 불가능한 것으로 나타났으며, 이는 더 큰 성상도가 성능을 향상시키는 2D 프로토콜과 대조된다.

#CVQKD #양자암호학 #연구

Distance-Adaptive CV-QKD via Rate-Adaptive FEC and SNR Tuning

Three strategies for distance-adaptive CV-QKD are experimentally validated: modulation variance tuning (reach to 79km), trusted detector loss (47.7km), and rate-adaptive RL-LDPC FEC (near-asymptotic SKR across wide distance range).

#CVQKD #QuantumCryptography #Research

Quantum CDMA Multiuser CV-QKD via Chaotic Phase Shifters

Novel q-CDMA framework enables N×N multiuser CV-QKD over a shared quantum channel using chaotic phase shifters and binary-tree beam-splitter networks, deriving secret key rates under collective attacks in both asymptotic and finite-size regimes.

#CVQKD #QuantumCryptography #Research

Frequency-Division Multiplexed CV-QKD with Enhanced Spectral Efficiency

4-channel FDM CV-QKD system achieves 3.7× secret key rate gain over single-channel baseline, outperforming up to 41.1 km. Dense low-symbol-rate multiplexing proves superior to high-baud single-channel approaches within shot-noise-dominant bandwidth.

#CVQKD #QuantumCryptography #Research

כיול יעילות גילוי הטרודין הניתן למעקב SI עבור מקלטי CV-QKD

חוקרי DFM הדגימו פרוטוקול הניתן למעקב SI לכיול יעילות מקלט הטרודין המאוזן באמצעות מדידות ESA מוכוונות רעש-ירייה, תוך השגת η=0.386±0.012 (k=2) על פני תחום IF של 20–80 מגה-הרץ עבור מערכות CV-QKD ואופטיקה קוהרנטית.

#CVQKD #מטרולוגיהקוונטית #מחקר

การสอบเทียบประสิทธิภาพการตรวจจับเฮเทอโรไดน์ที่สอบกลับได้ตามมาตรฐาน SI สำหรับตัวรับสัญญาณ CV-QKD

นักวิจัย DFM ได้สาธิตโพรโทคอลที่สอบกลับได้ตามมาตรฐาน SI เพื่อสอบเทียบประสิทธิภาพของตัวรับสัญญาณเฮเทอโรไดน์แบบสมดุล โดยใช้การวัด ESA ที่อ้างอิงกับช็อตนอยส์ ได้ค่า η=0.386±0.012 (k=2) ในช่วงความถี่กลาง 20–80 MHz สำหรับระบบ CV-QKD และระบบออปติกแบบโคฮีเรนต์

#CVQKD #มาตรวิทยาควอนตัม #การวิจัย

SI-Traceable Heterodyne Detection Efficiency Calibration for CV-QKD Receivers

DFM researchers demonstrated an SI-traceable protocol to calibrate balanced heterodyne receiver efficiency using shot-noise-referenced ESA measurements, achieving η=0.386±0.012 (k=2) across 20–80 MHz IF for CV-QKD and coherent optical systems.

#CVQKD #QuantumMetrology #Research

How secure is your data in the age of quantum computing? Discover a revolutionary framework for CV-QKD protocols that tackles real-world challenges and unlocks the potential of satellite-based quantum communication. #QuantumSecurity #CVQKD #FutureOfCommunication LINK

DSP Boosts Continuous-Variable QKD: Cross‑Domain Review

A systematic review of 220 papers (2021‑2025) shows DSP tools from coherent optics are being repurposed for continuous‑variable QKD, boosting phase sync and lowering excess noise. getnews.me/dsp-boosts-continuous-va... #cvqkd #quantumcommunication

Discover a groundbreaking multi-user CV-QKD framework that boosts key rate and security, revolutionizing data protection and quantum networks! How do you think this will impact cybersecurity? #QuantumSecurity #CVQKD #TechInnovation LINK