检索结果-内蒙古大学图书馆

Further results on constructions of generalized bent Boolean functions

science China(Information sciences) 2016年第5期59卷 242-244页

作者： Fengrong ZHANG Shixiong XIA Pantelimon STANICA Yu ZHOU School of Computer Science and Technology China University of Mining and Technology State Key Laboratory of Integrated Services Networks Xidian University Naval Postgraduate School Applied Mathematics Department Science and Technology on Communication Security Laboratory

Dear editor,Boolean bent functions were introduced by Rothaus in 1976 as an interesting combinatorial object with the important property of having optimal nonlinearity[1].Since bent functions have many applications in sequence design,cryptography and algebraic coding,they have been extensively studied during the last thirty years[2,3].Over the past decades,based on bent functions,several constructions of highly nonlinear balanced functions were presented[4,5].

关键词： Further results on constructions of generalized bent Boolean functions Zn

来源：评论

学校读者我要写书评

暂无评论

An Orthogonal Dual-Polarization and Time Multiplexing Scheme of Continuous-Variable Quantum Key Distribution 21

An Orthogonal Dual-Polarization and Time Multiplexing Scheme...

引用

21st International Conference on Optical communications and Networks, ICOCN 2023

作者： Zhang, Shuai Pan, Yan Wang, Heng Shao, Yun Zhang, Tao Liu, Jinlu Pi, Yaodi Ye, Ting Huang, Wei Li, Yang Xu, Bingjie Institute of Southwestern Communication Science and Technology on Communication Security Laboratory Chengdu610041 China

ISBN: (纸本)9798350343502

In this article, we propose a time and orthogonal polarization division multiplexing scheme for local local oscillator continuous-variable quantum key distribution (LLO CV-QKD) system. According to the influence mechanism of time-domain diffusion and polarization disturbance on the key parameters, such as the channel transmittance and excess noise, of the studied system, we established a dual-polarization theoretical model and verified its validity by simulations. Here, the pulse width at the nanosecond level and polarization extinction ratio (PER) are considered for optimizing the performance of secure key rate (SIKR) quantitatively. For transmitting over 25 km optical fiber, the required PER should be above 22 dB when the pulse width is fixed to lns. Moreover, the optimal repetition frequency is obtained. In this case, 5.25 Mbps SKR can be achieved under the lns pulse width and 25dB PER, considering the 10 11 finite-size block. Our work provides a systematic and theoretical framework for the study of improving the SKR of the dual-polarization CV-QKD system. © 2023 IEEE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

High-speed implementation of privacy amplification for continuous-variable quantum-key distribution with Toeplitz matrix based on FPGA 10

High-speed implementation of privacy amplification for conti...

引用

Quantum and Nonlinear Optics X 2023

作者： Luo, Yujie Li, Yang Ma, Li Zhou, Chuang Yang, Jie Wu, Mei Zhang, Shuai Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

For a high-speed and secure continuous-variable quantum key distribution (CV-QKD) system, privacy amplification (PA) plays an important role. To reduce the finite size effect, the input length of PA should be at least on the order of 10^8, 10^9, 10^10 when the transmission distance is about 50km, 80km, 100km, respectively. This leads to high computation complexity and large storage demand of the data, which is unfriendly to field programmable gate array (FPGA) implementation for its limited resource. In addition, the limited IO speed of Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM) restricts the implementation performance of PA. In this paper, we propose an effective way to access data based on DDR to improve the performance of PA. As a result, the reading time from DDR can be reduced, and it can eliminate the effect of the limited IO speed of DDR, so that PA can perform with multiple code-words. This can make full use of the resource of FPGA and increase the execution speed of PA. Besides, combining with the proposed method, an easier algorithm is used to decrease the complexity of calculations. Based on these methods, we realize PA with Toeplitz matrix based on FPGA and the experimental throughput is about 288Mbps when the input length is about 100Mbits. © 2023 SPIE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

Monitoring the source noise of a plug-and-play continuous variable quantum key distribution system 10

Monitoring the source noise of a plug-and-play continuous va...

引用

Quantum and Nonlinear Optics X 2023

作者： Shao, Yun Pan, Yan Wang, Heng Pi, Yaodi Ye, Ting Liu, Jinlu Li, Yang Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

The source noise in plug-and-play continuous variable quantum key distribution (CV-QKD) system plays a crucial role in determining the secret key rate and transmission distance. In general, the source noise is considered untrusted and fully controlled by Eve, which is because the laser travels through the unsecure channel before being modulated. However, this may overestimate the key information stolen by Eve leading to an underestimation of the key rate share between the legal communication parties. Here, we use a beam-splitter with signal attenuation to model the source noise combined with source monitoring scheme to characterize the source imperfection in the plug-and-play CV-QKD system. We show that the performance of the plug-and-play CV-QKD can be significantly improved under the above scheme compared to the untrusted source model. Our numerical simulation results also show that the plug-and-play CV-QKD with source monitoring has a key generation rate close to that of a trusted source under the same simulation parameters. © 2023 SPIE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

A high-throughput and FPGA-based LDPC decoder for continuous-variable quantum key distribution system 10

A high-throughput and FPGA-based LDPC decoder for continuous...

引用

Quantum and Nonlinear Optics X 2023

作者： Zhou, Chuang Li, Yang Ma, Li Luo, Yujie Yang, Jie Wu, Mei Zhang, Shuai Huang, Wei Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

The throughput of error correction is one of the main bottlenecks of high-speed continuous variable quantum key distribution (CV-QKD) post-processing, which directly restricts the practical secret key rates (SKR). Implementing the decoder of low-density parity-check (LDPC) codes based on FPGA in limited precision can improve the decoding throughput significantly. In this paper, a high-throughput decoder architecture with limited precision for quasi-cyclic LDPC (QC-LDPC) codes is proposed. In particular, decoding of two typical LDPC codes, with code rates 0.2 and 0.1, for CV-QKD have been implemented on a commercial FPGA. The clock operates at 100 MHZ and the throughput of 1.44 Gbps and 0.78 Gbps is achieved, respectively, which can support 71.89 Mbps and 9.97 Mbps real-time SKR under transmission distance of 25 km and 50 km, respectively. The proposed architecture paves the way for high-rate real-time CV-QKD deployment in secure metropolitan area network. © 2023 SPIE.

关键词： Field programmable gate arrays (FPGA)

来源：评论

学校读者我要写书评

暂无评论

Practical Phase Noise Model for Continuous Variable Quantum Key Distribution with a Real Local Oscillator 19

Practical Phase Noise Model for Continuous Variable Quantum ...

引用

19th International Conference on Optical communications and Networks, ICOCN 2021

作者： Shao, Yun Huang, Wei Li, Yang Wang, Heng Pan, Yan Pi, Yaodi Zhang, Chenlin Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781665424462

In continuous-variable quantum key distribution with a local local oscillator (LLO CV-QKD), the phase noise after phase compensation is mainly composed of three parts: the relative phase drift noise, the relative phase accumulated noise, and the phase-reference measurement noise. Here, we develop a practical phase noise model for LLO CV-QKD protocols, in which part of the phase-reference measurement noise that can be locally calibrated by Bob at the receiver side is considered to be trusted noise. It is reasonable to adopt this model because Bob’s apparatus is inaccessible to the eavesdropper. We show that the secret key rate and the transmission distance of the LLO CV-QKD system under the practical phase noise model is significantly improved in comparison to that under the conventional phase noise model. We show that the secret key rate is improved more than 65% and the transmission distance is increased more than 70% with some typical simulation parameters. © 2021 IEEE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

Simple and Fast Polarization Tracking algorithm for Continuous-Variable Quantum Key Distribution System

Simple and Fast Polarization Tracking algorithm for Continuo...

引用

2023 Optical Fiber communications Conference and Exhibition, OFC 2023

作者： Pan, Yan Wang, Heng Shao, Yun Pi, Yaodi Ye, Ting Li, Yang Huang, Wei Xu, Bingjie Institute of Southwestern Communication Science and Technology on Communication Security Laboratory Chengdu610041 China

A simple and fast polarization tracking algorithm for pilot tone-assisted CV-QKD system is demonstrated. Experimental results show that the proposed algorithm can track polarization scrambling rate ≥12.57 krad/s with... 详细信息

ISBN: (纸本)9781957171180

关键词： Quantum optics

来源：评论

学校读者我要写书评

暂无评论

25 MHz repetition rate pilot-tone-assisted Gaussian-modulated continuous-variable quantum key distribution with a local local oscillator 19

25 MHz repetition rate pilot-tone-assisted Gaussian-modulate...

引用

19th International Conference on Optical communications and Networks, ICOCN 2021

作者： Wang, Heng Pi, Yaodi Shao, Yun Pan, Yan Huang, Wei Li, Yang Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781665424462

We experimentally demonstrate a 25 MHz repetition rate pilot-tone-assisted Gaussian-modulated continuous-variable quantum key distribution (CVQKD) with a local local oscillator (LLO) by employing the frequency-multiplexing and polarization-multiplexing techniques. In the proposed LLO-CVQKD system, the strong pilot tone and weak quantum signal can be separated in different frequency and polarization domain for avoiding the crosstalk between them and guaranteeing different detection requirements of low-noise for quantum signal and high-saturation limitation for pilot tone. Moreover, the dominant phase noise over 25 km optical fiber channel can be compensated in real time for supporting high secure key rate of 1.61 Mbps in the asymptotic regime. © 2021 IEEE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

A New Scheme for Orthogonal Dual-Polarization Continuous-Variable Quantum Key Distribution 10

A New Scheme for Orthogonal Dual-Polarization Continuous-Var...

引用

Quantum and Nonlinear Optics X 2023

作者： Zhang, Shuai Pan, Yan Wang, Heng Shao, Yun Zhang, Tao Liu, Jinlu Pi, Yaodi Huang, Wei Li, Yang Xu, Bingjie Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu610041 China

ISBN: (纸本)9781510667990

In this article, we propose a pilot alternately assisted scheme of orthogonal dual-polarization and time multiplexing for the local local oscillator continuous-variable quantum key distribution (LLO CV-QKD). Our scheme utilizes time multiplexing and dual-polarization multiplexing techniques to dramatically isolate the quantum signal from the pilot light. To analyze the influence mechanism of time-domain diffusion and polarization perturbation on the key parameters, such as the channel transmittance and excess noise, of the studied system, a general LLO excess noise model based on polarization extinction ratio (PER) and time-domain pulse extinction ratio (TER) is established. We mainly focus on the photon-leakage noise from the reference path to the quantum signal path, which is first analyzed in the dual polarization LLO regime. Furthermore, we conduct a series of simulations to verify the proposed dual polarization and time multiplexing model. Results show that it maintains a low level of excess noise and a secure key rate (SKR) of 10.25 Mbps@25km can be obtained under the finite-size effect. We achieved 0.93Mbps@25km SKR under a relatively low PER of 17 dB in the nanosecond level pulse width. Our work greatly extends the application scenarios of the dual-polarization division multiplexing CV-QKD system and provides a theoretical and representative framework for the study of improving the performance of the dual-polarization CV-QKD system. © 2023 SPIE.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

A Novel Orthogonal LoRa Multiple Access Algorithm for Satellite Internet of Things

引用

China communications 2022年第3期19卷 279-289页

作者： Chengwen Zhang Liankai Wang Libin Jiao Shipeng Wang Jun Shi Jia Yue School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150080China Science and Technology on Communication Networks Laboratory Shijiazhuang 050081China Key Laboratory of Police Wireless Digital Communication Ministry of Public SecurityHarbin 150001China

In recent years,LoRa has been extensively researched in the satellite Internet of Things(IoT).However,the multiple access technology of LoRa is still one of the bottlenecks of satellite *** improve the multiple access performance of LoRa satellite IoT,based on the orthogonality of LoRa symbols in the fractional domain,this paper proposes a low complexity Orthogonal LoRa Multiple Access(OLMA)algorithm for multiple LoRa users occupying the same frequency *** algorithm introduces the address code to divide the fractional bandwidth into multiple parts,and the OLMA users with different address codes occupy different parts to transmit the information code,thus avoiding mutual interference caused by collisions in the same frequency *** multiple access capability of OLMA can be flexibly configured only by simply adjusting the length of the address code according to the actual application requirements of data *** analysis and simulation results show that the OLMA algorithm can greatly improve the multiple access capability and the total transmission bit rate of LoRa IoT without changing the existing LoRa modulation parameters and process.

关键词： LoRa satellite Internet of Things multiple access fractional domain linear frequency modulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：