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Towards Privacy-Preserving Cloud Storage:A Blockchain Approach

Computers, Materials & Continua 2021年第12期69卷 2903-2916页

作者： Jia-Shun Zhang Gang Xu Xiu-Bo Chen Haseeb Ahmad Xin Liu Wen Liu Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing100876China School of Information Science and Technology North China University of TechnologyBeijing100144China Department of Computer Science National Textile UniversityFaisalabad37610Pakistan Inner Mongolia University of Science&Technology School of Information EngineeringBaotou014010China State Key Laboratory of Media Convergence and Communication Communication University of China School of Computer Science and Cybersecurity Communication University of China Key Laboratory of Convergent Media and Intelligent Technology Communication University of China Ministry of EducationBeijing102204China

With the rapid development of cloud computing technology,cloud services have now become a new business model for information *** cloud server provides the IT resources required by customers in a selfservice manner through the network,realizing business expansion and rapid ***,due to the insufficient protection of data privacy,the problem of data privacy leakage in cloud storage is threatening cloud *** address the problem,we propose BC-PECK,a data protection scheme based on blockchain and public key searchable ***,all the data is protected by the encryption *** privacy data is encrypted and stored in a cloud server,while the ciphertext index is established by a public key searchable encryption scheme and stored on the ***,based on the characteristics of trusted execution of smart contract technology,a control mechanism for data accessing and sharing is *** transaction is automatically recorded on the blockchain,which is fairer under the premise of ensuring the privacy and security of the data sharing ***,we analyzed the security and fairness of the current *** the comparison with similar schemes,we have shown the advantages of the proposed scheme.

关键词： Blockchain privacy protection smart contract public encryption keyword search

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The autocorrelation distribution of balanced Boolean function

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Frontiers of Computer science 2013年第2期7卷 272-278页

作者： Yu ZHOU Weiguo ZHANG Juan LI Xinfeng DONG Guozhen XIAO Science and Technology on Communication Security Laboratory China Chengdu 610041 State Key Laboratory of Integrated Service Networks Xidian UniversityChina Xi'an 710071 Foreign Language Department Emei Campus Southwest Jiaotong University China Emei 614202 State Key Laboratory of Information Security Chinese Academy of SciencesChina Beijing 100093

The global avalanche characteristics （the sum- of-squares indicator and the absolute indicator） measure the overall avalanche characteristics of a cryptographic Boolean function. Sung et al. （1999） gave the lower bound on the sum- of-squares indicator for a balanced Boolean function satisfy- ing the propagation criterion with respect to some vectors. In this paper, if balanced Boolean functions satisfy the propaga- tion criterion with respect to some vectors, we give three nec- essary and sufficient conditions on the auto-correlation distri- bution of these functions reaching the minimum the bound on the sum-of-squares indicator. And we also find all Boolean functions with 3-variable, 4-variable, and 5-variable reaching the minimum the bound on the sum-of-squares indicator.

关键词： Boolean functions auto-correlation distribu-tion global avalanche characteristics balanced propagationcriterion

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Design and simulation of a S-band high gain antenna with metamaterial lens

Design and simulation of a S-band high gain antenna with met...

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2011 Cross Strait Quad-Regional Radio science and Wireless technology Conference, CSQRWC 2011

作者： Huang, Shuai Yang, Cheng Hua, Jun Wu, Qun Dept. of Microwave Engineering Harbin Institute of Technology Harbin 150001 China Science and Technology on Communication Information Security Control Laboratory Jiaxing 314033 China

ISBN: (纸本)9781424497904

The patch antenna with metamaterial lens can effectively enhance the gain of the antenna. A new type of metamaterial lens is proposed in this paper, it is easy to distinguish as double negative metamaterial, presenting a negative permitivity and a negative permeability simultaneously. The novel structure can work at a lower frequency and the passband of metamaterial lens can get a good performance in a wide band. Moreover, the designed metamaterial lens do not change the S-parameter of the patch antenna. With the new structure of the metamaterial lens, the gain can be enhanced by 2 dB. © 2011 IEEE.

关键词： Microstrip antennas

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Cognitive Method Discussion on communication Jamming Intelligent Decision 2020

Cognitive Method Discussion on Communication Jamming Intelli...

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2020 International Conference on Aviation Safety and information technology, ICASIT 2020

作者： Jin, Hu Shen, Weiguo Zhao, Fan Science and Technology on Communication Information Security Control Laboratory Research Institute Jiaxing China Electronic Countermeasure Institute National University of Defense Technology Hefei China

ISBN: (纸本)9781450375764

The application of reconfigurable, programmable and cognitive radio technologies in communication systems has put forward new requirements for communication jamming decision. In this paper, the overall scheme of cognition-based jamming communication jamming decision methods is presented first. Then the method of intelligent communication jamming decision based on reinforcement learning is discussed under the condition of a large number of data samples of the communication signal, and how to build the element library of jamming strategy and how to describe the behavior of communication signal are described in detail. Moreover, the real-time dynamic jamming effect evaluation method based on target communication signal behavior learning is also discussed. As a result, an online, self-learning and self-optimizing cognitive jamming closed-loop is realized. © 2020 ACM.

关键词： Reinforcement learning

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Code rate estimation and code sequence retrieval of the binary phase-coded radar signal using further autocorrelation analysing

Code rate estimation and code sequence retrieval of the bina...

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2019 International Conference on communications, information System, and Computer Engineering, CISCE 2019

作者： Jiang, Bin Li, Jie Yang, Xiaohong Zhu, Jun Xiong, Ying Tang, Bin Science and Technology on Communication Information Security Control Laboratory 36th Research Institute of CETC Jiaxing China University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9781728136813

The binary phase-coded radar signal code rate estimation and code sequence retrieval are important in EW and ELINT. In this paper, the statistical autocorrelation function of the binary phase-coded radar signal is studied in depth, and a code rate estimation and a code sequence retrieval method are proposed. With the signal symbol length rough estimation, the sampling points of calculating statistical autocorrelation function can be adaptively selected. Furthermore, exploring the valley points of the autocorrelation function envelope to detect the signal phase abrupt points, the signal code rate can be estimated and the code sequence can be recovered. Experimental results corroborate that the proposed method can effectively reduce the mean square errors of the code rate estimation and code sequence retrieval in low signal to noise ratio (SNR) conditions. © 2019 IEEE.

关键词： Mean square error

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Swing error phase modulation jamming method of airborne SAR

Swing error phase modulation jamming method of airborne SAR

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2019 International Conference on communications, information System, and Computer Engineering, CISCE 2019

作者： Li, Jie Jiang, Bin Liang, Wenyan Zhu, Jun Xiong, Ying Tang, Bin Science and Technology on Communication Information Security Control Laboratory 36th Research Institute of CETC Jiaxing China University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9781728136813

A new airborne synthetic aperture radar (SAR) jamming-swing error phase modulation jamming is presented. The method uses the swing error of the line-of-sight SAR during the motion of the airborne SAR and modulate the phase error caused by the swing error to the radar signal received by the jammer to generate the jamming signal and transmit the jamming signal to the radar receiver. The effectiveness of this jamming method against the common motion error compensation algorithm-phase gradient autofocus (PGA) algorithm is analyzed. The simulation experiment verifies the correctness of the theoretical analysis. © 2019 IEEE.

关键词： Error compensation

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Bitstream protocol classification mechanism based on feature extraction

Bitstream protocol classification mechanism based on feature...

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2019 International Conference on Networking and Network Applications, NaNA 2019

作者： Wang, Wei Bai, Binbin Wang, Yichuan Hei, Xinhong Zhang, Li Science and Technology on Communication Information Security Control Laboratory No.36 Research Institution of CETC China College of Computer Science and Engineering Xi'An University of Technology Xi'an China

ISBN: (纸本)9781728126296

In recent years, with the continuous expansion of network communication scale, the types of niche protocols and various proprietary communication protocols are increasing day by day, but botnet and various network attacks have also emerged in endlessly. However, most of the commonly used network protocol recognition software uses a single method, and can only identify specific network data packets or data streams, the degree of automation is low, and the recognition accuracy is not high. In view of the above situation, this paper takes the bit flow protocol data frame as the research object, takes the multi-protocol recognition as the goal, and carries on the protocol feature recognition by comparing the data flow characteristics and the evaluation index. The features of the protocol to be detected are compared with the existing protocol features of the feature base, and the similarity between each protocol is judged. The extracted composite features are digitalized to generate 0-1 matrix, and clustering analysis is completed. The frame vector quantification algorithm of message data is designed and implemented to improve the clustering efficiency. The experimental results show that, compared with the traditional algorithm, the protocol eigenvector algorithm improves the accuracy by 15%, which can make the unknown protocol format be generated faster. © 2019 IEEE.

关键词： Network security

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Direct multi-hop time synchronization with constructive interference

Direct multi-hop time synchronization with constructive inte...

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11th ACM/IEEE Conference on information Processing in Sensing Networks, IPSN'12

作者： Wang, Yin Pan, Gaofeng Huang, Zhiyu MOE Key Lab. for Information System Security School of Software TNLIST China Science and Technology on Communication Information Security Control Laboratory China Institute of Software Chinese Academy of Sciences China

ISBN: (纸本)9781450312271

Multi-hop time synchronization in wireless sensor networks (WSNs) is often time-consuming and error-prone due to random time-stamp delays for MAC layer access and unstable clocks of intermediate nodes. Constructive interference (CI), a recently discovered physical layer phenomenon, allows multiple nodes transmit and forward an identical packet simultaneously. By leveraging CI, we propose direct multi-hop (DMH) time synchronization by directly utilizing the time-stamps from the sink node instead of intermediate nodes, which avoids the error caused by the unstable clock of intermediate nodes. DMH doesn't need decode the flooding time synchronization beacons. Moreover, DMH explores the linear regression technique in CI based time synchronization to counterbalance the clock drifts due to clock skews. © 2012 ACM.

关键词： Synchronization

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A Review of Intelligent Configuration and Its security for Complex Networks

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Chinese Journal of Electronics 2024年第4期33卷 920-947页

作者： Yue ZHAO Bin YANG Fei TENG Xianhua NIU Ning HU Bo TIAN Science and Technology on Communication Security Laboratory School of Computer and Information Engineering Chuzhou University School of Computing and Artificial Intelligence Southwest Jiaotong University School of Computer and Software Engineering Xihua University Cyberspace Institute of Advanced Technology Guangzhou University

Complex networks are becoming more complex because of the use of many components with diverse technologies. In fact, manual configuration that makes each component interoperable has breed latent danger to system security. There is still no comprehensive review of these studies and prospects for further research. According to the complexity of component configuration and difficulty of security assurance in typical complex networks, this paper systematically reviews the abstract models and formal analysis methods required for intelligent configuration of complex networks, specifically analyzes, and compares the current key technologies such as configuration semantic awareness, automatic generation of security configuration, dynamic deployment, and verification evaluation. These technologies can effectively improve the security of complex networks intelligent configuration and reduce the complexity of operation and maintenance. This paper also summarizes the mainstream construction methods of complex networks configuration and its security test environment and detection index system, which lays a theoretical foundation for the formation of the comprehensive effectiveness verification capability of configuration security. The whole lifecycle management system of configuration security process proposed in this paper provides an important technical reference for reducing the complexity of network operation and maintenance and improving network security.

关键词： Complex networks Intelligent configuration Configuration security Software defined network Lifecycle management

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Design Compact YOLO based Network for Small Target Detection on Infrared Image

Design Compact YOLO based Network for Small Target Detection...

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2022 Chinese Automation Congress, CAC 2022

作者： Liu, Shuang Liu, Zhicheng Li, Yuhai Liu, Wancheng Ge, Chenyang Liu, Longjun Xi'an China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin China

ISBN: (纸本)9781665465335

most YOLO object detection neural networks prefer to focus on traditional RGB image, but previous studies rarely consider special YOLO network with compact architecture for infrared image. In this paper, we analyze original YOLO network architecture, and we propose a compact YOLO based network by using different blocks from previous work for small target detection on infrared image. We use small target detection layer, GhostConv convolution, Focus structure, Focal EIOU Loss and soft NMS modules to improve original YOLO network structure, which improves the accuracy and speed of target detection for infrared image. The experimental results show that the accuracy of target detection of original model can be effectively improved by adding the small target detection layer, the Focus structure and the BI-FPN structure. By replacing the GhostConv convolution, the calculation speed is significantly improved. At last, after the model is quantized and deployed with NCNN framework, the object detection speed can reached to 35ms per infrared image. © 2022 IEEE.

关键词： Object detection

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