2018/04/09 by Xiangyu Wang, Yichen Zhang, Yi-Chen Zhang +2 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Computer security #Key (lock) #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum key distribution #Quantum mechanics #Variable (mathematics) #quant-ph
paper · pdf · doi:10.1109/jphot.2018.2824316
published as IEEE Photonics Journal 10(3), 7600309 (2018) · 10 pages, 3 figures
openalex publication_date 2018/04/09 · arxiv created 2018/05/07 · arxiv updated 2018/05/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Privacy amplification is an indispensable step in postprocessing of continuous-variable quantum key distribution (CV-QKD), which is used to distill unconditional secure keys from identical corrected keys between two distant legal parties. The processing speed of privacy amplification has a significant effect on the secret key rate of a CV-QKD system. We report the high-speed parallel implementation of the length-compatible privacy amplification algorithm based on a graphic processing unit. The length-compatible algorithm is used to satisfy the security requirements of privacy amplification at different transmission distances when considering finite-size effect. We achieve the speed of privacy amplification over 1 Gb/s at arbitrary input length and the speed is one to two orders of magnitude faster than previous demonstrations, which supports the high-speed real-time CV-QKD system and ensures the security of privacy amplification.