Secret key exchange in ultralong lasers by radiofrequency spectrum coding
作者机构:Universite de LimogesXLIMUMR CNRS 7252123 Avenue A.Thomas87060 LimogesFrance Physics DepartmentFaculty of ScienceTanta UniversityTantaEgypt Aston Institute of Photonic TechnologiesAston UniversityBirmingham B47ETUK Instituto de OpticaCSICC/Serrano 121Madrid 28006Spain
出 版 物:《Light(Science & Applications)》 (光(科学与应用)(英文版))
年 卷 期:2015年第4卷第1期
页 面:400-404页
核心收录:
学科分类:080901[工学-物理电子学] 0809[工学-电子科学与技术(可授工学、理学学位)] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程]
基 金:This work was supported by the French National Research Agency(grants LABEX SIGMALIM and ANR 08-JCJC-0122 PARADHOQS) the European Research Council(project ULTRALASER) the Leverhulme Trust(grant RPG-278) the Spanish MICINN project TEC2011-27314(RAMAS) We also acknowledge support by the XLIM Institute(grant VIP2013)
主 题:fiber lasers fiber optics communications optical security and encryption
摘 要:We propose a new approach to the generation of an alphabet for secret key exchange relying on small variations in the cavity length of an ultralong fiber *** new concept is supported by experimental results showing how the radiofrequency spectrum of the laser can be exploited as a carrier to exchange *** test bench for our proof of principle is a 50-km-long fiber laser linking two users,Alice and Bob,where each user can randomly add an extra 1-km-long segment of *** choice of laser length is driven by two independent random binary values,which makes such length become itself a random *** security of key exchange is ensured whenever the two independent random choices lead to the same laser length and,hence,to the same free spectral range.