Open AccessKey distribution based on synchronization in bandwidth-enhanced random bit generators with dynamic post-processing
Author(s) -
Chenpeng Xue,
Ning Jiang,
Kun Qiu,
Yunxin Lv
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.014510
Subject(s) - computer science , quantum key distribution , random number generation , key generation , physical layer , synchronization (alternating current) , chaotic , key (lock) , electronic engineering , bandwidth (computing) , key distribution , semiconductor laser theory , cryptography , laser , encryption , optics , algorithm , public key cryptography , telecommunications , physics , computer network , wireless , engineering , channel (broadcasting) , artificial intelligence , photon , computer security
We propose and numerically demonstrate a new scheme for key distribution on the physical layer based on the chaos synchronization and physical random bit generation. In this scheme, two chaotic semiconductor lasers are commonly driven by a third semiconductor laser, their output chaotic signals are employed as the physical sources of the random bit generators (RBGs). Under symmetry operation scenario, the two RBGs are well synchronized and the random bits generated by them are used to generate identical secret keys for Alice and Bob by the way of a dynamic post-processing technology. The feasibility and security of the proposed scheme are investigated by testing the parameters mismatch tolerance and the sensitivity to the systematic noise. The numerical results indicate that the dynamic and unpredictable post-processing can provide a great enhancement for the security of the secret key distribution. The security of the proposed scheme mainly determined by the post-processing, not confidential source, which provides a new potential way for implementing high-speed secure secret key distribution.