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IEEE Global Conference on Signal and Information Processing

作者： Yinjun Liu Lu Lu Geoffrey Li Qimei Cui National Engineering Laboratory for Mobile Network Security Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical and Computer Engineering Georgia Institute of Technology 30322 USA

ISBN: (纸本)9781479975921

Heterogenous network and massive MIMO can significantly enhance spectral and energy efficiency of wireless networks and therefore have attracted much attention. In this paper, we analyze the performance of a downlink heterogenous network where a macro base station (BS) is equipped with a large number of antennas. Lower bounds on ergodic rates for macro and pico users are derived when macro and pico BSs employ zero forcing and matched filter precoding matrix, respectively. To utilize high degrees of freedom introduced by massive MIMO, interference cancellation can be used to further improve the network performance. In this way, the macro BS can project signals for macro users to the null space of interference channels from macro BS to pico users. To maximize the overall network transmission rate by selecting the interference-free pico users, an algorithm based on statistical channel state information is developed, which can reduce the backhaul overhead. The analytical results are confirmed and the performance of the proposed algorithm is demonstrated by computer simulation.

关键词： Performance Analysis Interference

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A method of oversized image generation based on stitching JPEG file streams

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2015年第8期8卷 159-168页

作者： Sun, Qindong Hua, Wu Tian, Minying Wang, Yan School of Computer Science and Engineering Xi’an University of Technology Xi’an China Shaanxi Key Laboratory of Network Computing and Security Xi’an University of Technology Xi’an China

Due to memory limitation, the displaying and processing of the oversized images have been a bottleneck for various applications, which is a hot research spot in the image processing field. The traditional methods are almost based on the BMP format to generate oversized images, of which the time and space complexity are very high. In this paper, we have deeply analyzed the encoding scheme of JPEG image and proposed an oversized image generation method based on stitching JPEG file streams. According to this method, the oversized images are block plotted and then transformed and saved as JPEG format files respectively. In the end, the block JPEG files are then combined into an integrated JPEG image. The experiment results show that, our method can effectively improve the speed of oversized image generation and reduce the memory consumption. The time and space performance of our method are better than existing methods. © 2015 SERSC.

关键词： Image enhancement

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A New Program Classification Method Based on Binary Instrumentation and Instruction Flow Feature Extraction

A New Program Classification Method Based on Binary Instrume...

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Baojiang Cui Mengchen Cao Shilei Chen Weikong Qi School of Computer Science Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Mobile Network Security China Institute of Telecommunication Satellite CAST China

ISBN: (纸本)9781467383165

With the development of Internet technology, more and more unknown programs appears in the network environment, the detection and classification technology is increasingly becoming an important technology in the field of information security. This paper presents a new method of program classification using binary instrumentation, dynamic instruction flow feature extraction, auto feature selection and Naive Bayes classifier technology. Finally we use two-class classification, five categories, and twenty-class classification experiments to prove the correctness of the method and present the future direction for improvement of the method.

关键词： Feature extraction Heuristic algorithms Instruments Generators Classification algorithms Malware

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A deniable group key authentication scheme under random oracle model

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Journal of Information and Computational Science 2015年第9期12卷 3583-3597页

作者： Zhang, Gefei Fan, Dan Zhang, Yuqing Li, Xiaowei National Computer Network Intrusion Protection Center University of Chinese Academy of Sciences Beijing China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing China

Deniable encryption is one of the most important services for Group Key Authentication (GKA) schemes in modern networks. To provide secure properties of Deniable Group Key Authentication (DGKA) scheme, various DGKA schemes have been proposed in recent years. However, many of them mainly focus only on external malicious entities, while ignoring the internal malicious entities. To address this problem, we propose a new provable secure DGKA scheme based on Random Oracle (RO) model. The scheme uses the digital signature to identify internal malicious entities while keeping deniability and improving the security of the scheme. The scheme is also provable secure under the RO model. As it adds an extra step in broadcasting and uses Elliptic Curve Cryptography, the scheme enjoys better performance in terms of computation cost and security. ©, 2015, Journal of Information and Computational Science. All right reserved.

关键词： Authentication

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Detection of LTE Protocol Based on Format Fuzz

Detection of LTE Protocol Based on Format Fuzz

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Baojiang Cui Shengbo Feng Qinshu Xiao Ming Li School of Computer Science Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Mobile Network Security China Institute of Telecommunication Satellite CAST China

ISBN: (纸本)9781467383165

Through the analysis of LTE protocol and its security threat, this paper profoundly researches the security mechanism of RLC layer protocol in LTE protocol and the security detection technology of LTE protocol. In this paper, we use the improved fuzzing test technology to detect the potential security vulnerabilities in LTE protocol. In order to improve the efficiency, this paper improves the random Fuzzing test technology, proposes a new data mutation algorithm based on protocol format. By comparing the number of test cases, this paper verified the validity of the algorithm on the theory. According to the algorithm, we designed the fuzzing test framework, and detected LTE protocol based on N3-3 simulation platform. Through detection we have found a security defect in the RLC layer protocol, and it is verified that the security defect detection method of LTE protocol based on format fuzzing test is effective.

关键词： Protocols security Algorithm design and analysis Filtering Testing computer architecture Wireless communication

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Research on Storage and Retrieval Method of Mass Data for High-Speed Train

Research on Storage and Retrieval Method of Mass Data for Hi...

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International Conference on Computational Intelligence and security

作者： Bin Wang Fan Li Xinhong Hei Weigang Ma Lei Yu Shaanxi Key Laboratory for Network Computing and Security Technology Xi'an University of Technology Xi'an China School of Computer Science and Engineering Xi'an University of Technology Xi'an China

In order to ensure the safeties of high-speed train, a lot of sensors are installed in the train to real-time monitor its operation status. These sensors collect amounts of data which may be several GBs for one time operation of one train. Such big amount data need to be stored and managed with high efficiency. In this paper, a hybrid storage architecture by combine database and file system is proposed, in which the separation on the row and column is performed respectively when storing the raw monitored data. Further, an improved compression algorithm is used to compress double float data in the monitored data. The simulation result shows that the proposed method is effective and feasible.

关键词： Memory Indexes File systems Monitoring Sensors Servers

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Space Time Protocol Based on IEEE1588

Space Time Protocol Based on IEEE1588

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International Conference on Broadband, Wireless Computing, Communication and Applications (BWCCA)

作者： Jun Yang Yong Guo Zijing Cheng Kai Lin Baojiang Cui School of Computer Science Beijing University of Posts and Telecommunications Beijing China National Engineering Laboratory for Mobile Network Security China The Academy of Satellite Application Beijing China

ISBN: (纸本)9781467383165

With the increase in the number of satellites, the security time synchronization protocol between satellites and servers on the ground increasingly important. But, the time protocol that existing in space lack of security protections. Also, SEIEEE1588's author has gathered the advantage of both NTP and IEEE1588 protocol raise a security enhanced IEEE1588 protocol for deep-space environment (SEIEEE1588). The protocol just using symmetric encryption algorithm, does not consider the strong identity authentication, reasonable key update and other security measures. This paper on the basis of IEEE1588 and SEIEEE1588, research the time synchronization mechanism of IEEE1588, the security measures of SEIEEE1588 and safe data transmission protocols. At last, redesign the time synchronization protocol that contains identity authentication that use digital certificate to verify the identity of both sides, asymmetric encryption algorithm and reasonable key updates, to suitable the deep-space that is poor link quality, limited node computing power.

关键词： Clocks Protocols Synchronization Authentication Encryption

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QoS-aware User Satisfaction Oriented Joint Resource Block and Power Allocation in OFDMA Systems with Cloud Based Information Sharing

QoS-aware User Satisfaction Oriented Joint Resource Block an...

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2015 IEEE 16th International Conference on Communication Technology(ICCT 2015)

作者： Aini Li Yan Sun Xiaodong Xu XuYang Queen Mary University of London Electronic Engineering and Computer Science Beijing University of Posts and Telecommunications National Engineering Laboratory for Mobile Network Security MPI-QMUL InformationSystems Research Center (ISRC)

OFDMA is a suitable technique for delivering high data rate services and one of the most important technologies applied in LTE and 5G wireless *** OFDMA systems, dynamic resource block（RB）allocation considering QoS requirements is gaining widespread acceptance. However, along with the development of 5G and beyond 5G networks, how to efficiently allocate resource to satisfy various QoS requirements remains as a critical issue. In this paper, a QoS-aware user satisfaction oriented joint resource block and power allocation algorithm is proposed for an OFDMA multi-cell system. The objective is to optimize user satisfaction over the entire network by maximizing the number of qualified users whose QoS target is met with minimal power and bandwidth consumption. A two-dimensional power-and-RB strategy and cloud based information sharing are utilized to mitigate the inter-cell co-channel interference in order to increase the qualified user ratio. Simulation results show that the proposed algorithm significantly outperforms conventional schemes in terms of satisfying users’ QoS requirements and system throughput utility.

关键词： QoS-aware multi-cell OFDMA user satisfaction joint resource block and power allocation cloud based information sharing inter-cell co-channel interference

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Ciphertext-auditable identity-based encryption

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International Journal of network security 2015年第1期17卷 23-28页

作者： Lin, Changlu Li, Yong Lv, Kewei Chang, Chin-Chen Fujian Province Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou350007 China Beijing Municipal Commission of Education Beijing100044 China State Key Laboratory of Information Security Institute of Information Engineering CAS Beijing100049 China Department of Information Engineering and Computer Science Feng Chia University Taichung40724 Taiwan Department of Computer Science and Information Engineering Asia University Taichung41354 Taiwan

Ciphertext-auditability of public key encryption scheme means that the ciphertext should been verified by any-one whether it was actually created by the public key. It also should satisfy two additional requirements: 1) no adversary can create a valid-looking ciphertext and then it can pass the verification process together with a public key and a plaintext;2) the plaintext cannot be revealed from ciphertext without the help of the cor- rect private key. This paper, in the first time, proposes an ciphertext-auditable identity-based encryption. Our scheme doesn't need the certificates and the sender can di- rectly encrypt message via using the identity without the progress of public key authentication. Furthermore, the proposed scheme is provably secure under the standard model against the k-resilient ciphertext-auditability.

关键词： Public key cryptography

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Phase detection based range estimation with a dual-band robust Chinese remainder theorem

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Science China(Information Sciences) 2014年第2期57卷 18-26页

作者： YANG Bin WANG WenJie XIA XiangGen YIN QinYe Ministry of Education (MOE) Key Laboratory for Intelligent Networks and Network Security School of Electronics and Information EngineeringXi’an Jiaotong University Department of Electrical and Computer Engineering University of Delaware

Range estimation with multifrequency phases is a common practice in localization *** challenge of this method is the phase *** Chinese remainder theorem(CRT)based phase unwrapping algorithms have been proposed to solve the problem,where the wavelengths of the multifrequency signals need to be pair-wisely co-prime after they are divided by their greatest common divisor(gcd).This condition may limit the application in *** this paper,a novel way based on a dual-band robust CRT is presented to reconstruct the distance from dual-band wrapped phases,where the pair-wisely co-prime condition is not necessarily *** more wrapped phases are involved to reconstruct the distance,the method can significantly enlarge the reconstruction range compared to the single band solution.

关键词： range estimation Chinese remainder theorem(CRT) robustness dual band

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