工业物联网(industrial Internet of things,IIoT)设备通过云端收集和存储数据时,会遇到数据认证和隐私保护等问题.属性基签名(attribute-based signature,ABS)不仅可以实现数据认证,而且可以保护签名者的身份隐私.目前存在的SA-ABS(ser...工业物联网(industrial Internet of things,IIoT)设备通过云端收集和存储数据时,会遇到数据认证和隐私保护等问题.属性基签名(attribute-based signature,ABS)不仅可以实现数据认证,而且可以保护签名者的身份隐私.目前存在的SA-ABS(server-aided ABS)方案中,借助服务器减小了签名者和验证者的计算开销,而且通过抵抗签名者和服务器的共谋攻击保证了服务器辅助验证阶段的安全性.但是,现有的SA-ABS方案都不能对服务器产生的部分签名进行有效性验证,所以存在服务器对部分签名伪造的安全隐患.为克服这一挑战,提出一种服务器辅助且可验证的属性基签名(server-aided and verifiable ABS,SA-VABS)方案,该方案不仅减小了签名者和验证者的计算开销,而且通过抵抗签名者和服务器的共谋攻击来保证服务器辅助验证阶段的安全性,最重要的是对服务器产生的部分签名进行了有效性验证,从而保证了服务器辅助签名产生阶段的安全性.形式化安全性分析表明SA-VABS方案是安全的.仿真实验和对比分析表明SA-VABS方案在保证效率的同时提高了安全性.展开更多
We demonstrate a multi-wavelength Brillouin-erbium fiber laser(BEFL)with narrow linewidth and tunable wavelength interval using dual-wavelength Brillouin pumping.The generation of multi-wavelength output in BEFL is ba...We demonstrate a multi-wavelength Brillouin-erbium fiber laser(BEFL)with narrow linewidth and tunable wavelength interval using dual-wavelength Brillouin pumping.The generation of multi-wavelength output in BEFL is based on the combination of stimulated Brillouin scattering(SBS)and four-wave mixing(FWM)effect in a fiber cavity.The tunable wavelength interval is determined by the artificially controlled wavelength interval of the pumping lasers.The BEFL could compress a 1 MHz pump laser to a 340 Hz Brillouin Stokes laser,which proves the BEFL has excellent capability of linewidth compression.An erbium-doped fiber pumped by 980 nm laser is inserted into the cavity to further amplify the Brillouin laser.The wideband multi-wavelength BEFL covering over 50 nm is successfully generated when the 980 nm pump power is 400 mW.These features of multi-wavelength BEFL provide an effective method for optical communication systems and optical fiber sensing.展开更多
文摘工业物联网(industrial Internet of things,IIoT)设备通过云端收集和存储数据时,会遇到数据认证和隐私保护等问题.属性基签名(attribute-based signature,ABS)不仅可以实现数据认证,而且可以保护签名者的身份隐私.目前存在的SA-ABS(server-aided ABS)方案中,借助服务器减小了签名者和验证者的计算开销,而且通过抵抗签名者和服务器的共谋攻击保证了服务器辅助验证阶段的安全性.但是,现有的SA-ABS方案都不能对服务器产生的部分签名进行有效性验证,所以存在服务器对部分签名伪造的安全隐患.为克服这一挑战,提出一种服务器辅助且可验证的属性基签名(server-aided and verifiable ABS,SA-VABS)方案,该方案不仅减小了签名者和验证者的计算开销,而且通过抵抗签名者和服务器的共谋攻击来保证服务器辅助验证阶段的安全性,最重要的是对服务器产生的部分签名进行了有效性验证,从而保证了服务器辅助签名产生阶段的安全性.形式化安全性分析表明SA-VABS方案是安全的.仿真实验和对比分析表明SA-VABS方案在保证效率的同时提高了安全性.
基金supported by the National Key Research and Development Program of China(No.2018YFB0504400)the National Natural Science Foundation of China(Nos.61775107,11674177 and 61640408)the Tianjin Natural Science Foundation(No.19JCZDJC31200)。
文摘We demonstrate a multi-wavelength Brillouin-erbium fiber laser(BEFL)with narrow linewidth and tunable wavelength interval using dual-wavelength Brillouin pumping.The generation of multi-wavelength output in BEFL is based on the combination of stimulated Brillouin scattering(SBS)and four-wave mixing(FWM)effect in a fiber cavity.The tunable wavelength interval is determined by the artificially controlled wavelength interval of the pumping lasers.The BEFL could compress a 1 MHz pump laser to a 340 Hz Brillouin Stokes laser,which proves the BEFL has excellent capability of linewidth compression.An erbium-doped fiber pumped by 980 nm laser is inserted into the cavity to further amplify the Brillouin laser.The wideband multi-wavelength BEFL covering over 50 nm is successfully generated when the 980 nm pump power is 400 mW.These features of multi-wavelength BEFL provide an effective method for optical communication systems and optical fiber sensing.
