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Spatial domain image steganalysis based on wavelet coefficient dependency

Guangdianzi Jiguang/Journal of Optoelectronics Laser 2012年第5期23卷 972-979页

作者： Zhang, Min-Qing Lei, Yu Computer College of Northwestern Polytechnical University Xi'an Shaanxi 710072 China Key Laboratory of Network and Information Security of Armed Police Force Engineering University of Armed Police Force Xi'an 710086 China

Based on wavelet coefficient dependency, a novel general image steganalysis technique for spatial domain steganography is proposed. First, the mutual information is exploited to analyze the change on the scale and orientation dependency between wavelet coefficients, which is caused by the embedding of a message, and the Markov model is applied to model the dependency between wavelet cofficients so as to extract intrascale and interscale transition probability matrices which are used as feature vectors. Then, a weighted feature fusion method is used to fuse these feature vectors and the fisher linear discriminant (FLD) is designed to classify them. The experiments on least significant bit (LSB), LSB matching and stochastic modulation (SM) steganography show that the method can detect stego images reliably and the detection accuracy of this method exceeds that of its closest competitors obviously under the same computer complexity.

关键词： Steganography

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Text content filtering based on chinese character reconstruction from radicals

Text content filtering based on chinese character reconstruc...

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作者： He, Wenlei Liu, Gongshen Luo, Jun Lin, Jiuchuan School of Information Security Engineering Shanghai Jiao Tong University China Key Lab of Information Network Security of Ministry of Public Security Third Research Institute of Ministry of Public Security China

ISBN: (纸本)9783642236013

Content filtering through keyword matching is widely adopted in network censoring, and proven to be successful. However, a technique to bypass this kind of censorship by decomposing Chinese characters appears recently. Chinese characters are combinations of radicals, and splitting characters into radicals pose a big obstacle to keyword filtering. To tackle this challenge, we proposed the first filtering technology based on combination of Chinese character radicals. We use a modified Rabin-Karp algorithm to reconstruct characters from radicals according to Chinese character structure library. Then we use another modified Rabin-Karp algorithm to filter keywords among massive text content. Experiment shows that our approach can identify most of the keywords in the form of combination of radicals and yields a visible improvement in the filtering result compared to traditional keyword filtering. © 2011 ICST Institute for computer Science, Social Informatics and Telecommunications Engineering.

关键词： Pattern matching

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L-WMxD: Lexical based Webmail XSS Discoverer

L-WMxD: Lexical based Webmail XSS Discoverer

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2011 IEEE Conference on computer Communications Workshops, INFOCOM WKSHPS 2011

作者： Tang, Zhushou Zhu, Haojin Cao, Zhenfu Zhao, Shuai Department of Computer Science and Engineering Shanghai Jiao Tong University China Key Laboratory of Information Network Security Ministry of Public Security China

ISBN: (纸本)9781457702488

XSS (Cross-Site Scripting) is a major security threat for web applications. Due to lack of source code of web application, fuzz technique has become a popular approach to discover XSS in web application except Webmail. This paper proposes a Webmail XSS fuzzer called L-WMxD (Lexical based Webmail XSS Discoverer). L-WMxD , which works on a lexical based mutation engine, is an active defense system to discover XSS before the Webmail application is online for service. The engine is initialized by normal JavaScript code called seed. Then, rules are applied to the sensitive strings in the seed which are picked out through a lexical parser. After that, the mutation engine issues multiple test cases. Newly-generated test cases are used for XSS test. Two prototype tools are realized by us to send the newly-generated test cases to various Webmail servers to discover XSS vulnerability. Experimental results of L-WMxD are quite encouraging. We have run L-WMxD over 26 real-world Webmail applications and found vulnerabilities in 21 Webmail services, including some of the most widely used Yahoo!Mail, Mirapoint Webmail and ORACLE' Collaboration Suite Mail. © 2011 IEEE.

关键词： Engines

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Feature selection based on particle swarm optimal with multiple evolutionary strategies

Feature selection based on particle swarm optimal with multi...

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International Conference on information Fusion

作者： Jing Zhao Chongzhao Han Bin Wei Qi Zhao Peng Xiao Kedai Zhang MOE Key Lab For Intelligent Networks and Network Security SKLMSE Institute of Integrated Automation School of Elect. and Info. Engineering Xi'an Jiaotong University Xi'an China System Engineering Institute of Electronic and Information Engineering School Xi'an Jiaotong University Xi'an China Beijing Institute of Graphics Beijing China

ISBN: (纸本)9780982443859

Feature selection is an effective data preprocessing step to reduce the dimension of feature space and save storage space. Binary particle swarm optimization (BPSO) has been applied successfully to solve feature selection problem. But it was easy to fall into local optimal point. M2BPSO was an improved BPSO algorithm. The particles of M2BPSO were updated by using various evolutionary strategies according to the performance of them, in addition, the mutation was used to overcome premature. In this paper, we adopted M2BPSO to solve feature selection problem. To test the validity of the algorithm, we compared it with various versions of BPSO methods. Experimental results showed that M2BPSO could effectively solve the feature selection problem.

关键词： Binary Particle swarm optimal multiple evolutionary strategies feature selection support vector machine wrapper method

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An architecture description language based on dynamic description logics for self-healing systems

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International Journal of Advancements in Computing Technology 2012年第18期4卷 89-96页

作者： Wang, Zhuxiao Peng, Hui Guo, Jing Wu, Kehe Cui, Wenchao Wang, Xiaofeng School of Control and Computer Engineering State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China Education Technology Center Beijing International Studies University Beijing 100024 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China School of Control and Computer Engineering Institute of Electric Information Security Engineering Research Center of Power Information North China Electric Power University Beijing 102206 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As biological systems exhibit adaptation, healing and robustness in the face of changing environmental behavior, this paradigm has actuated research dealing with the concept of self-healing systems, which attempt to heal themselves in the sense of recovering from malicious attacks and rectifying of system faults. The goal of self-healing systems is to provide survivable systems that require high dependability, robustness, adaptability, and availability. Such systems maintain one or more models, whether external or internal, at run time as a basis for identifying problems and resolving them. This article describes an architectural description language, called ADML, which is being developed as a new formal language and/or conceptual model for representing evolving software architectures. The ADML embraces dynamic change as a fundamental consideration, supports a broad class of adaptive changes at the architectural level, and offers a uniform way to represent and reason about both static and dynamic aspects of self-healing systems. Because the ADML is based on the Dynamic Description Logic DDL(SHON (D)), which can represent both dynamic semantics and static semantics under a unified logical framework, architectural ontology entailment for the ADML languages can be reduced to knowledge base satisfiability in DDL(SHON (D)), and dynamic description logic algorithms and implementations can be used to provide reasoning services for ADML. In this article, we present the syntax of ADML, explain its underlying semantics using the Dynamic Description Logic DDL(SHON (D)), and exemplify our approach by applying it to the domain of load balancing a wireless remote-access system;the preliminary results certify the potential of the approach.

关键词： Formal languages

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The availability of fast-flux service networks

The availability of fast-flux service networks

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2011 International Conference on Selected Topics in Mobile and Wireless networking, iCOST 2011

作者： Xu, Yunfeng Lu, Yansheng Guo, Zhengbiao School of Computer Science and Technology Hua Zhong University of Science and Technology Wuhan China Hubei Province Public Security Bureau to Defend the Corps Cyber Security Key Lab of Information NetWork Security Ministry of Public Security China

ISBN: (纸本)9781457720048

Fast-flux service network (FFSN) is consisted of a large scale of computers which have two main functions. Firstly, by providing a pool of huge number of IP addresses, the controller of FFSN can choose the IPs to provide services for their own domain name. Secondly, these computers can be served as agents to hide mother-ship. The character of FFSN is that the DNS records of domain name changes constantly at a high frequency. In this paper, we analyze the issue on the reliability of FFSN. The issue is resulted from the uncontrollable nodes of FFSN. We establish a model to describe the reliability by the theory of Poisson Process, and analyze the relationship between the reliability of FFSN and its size. © 2011 IEEE.

关键词： Reliability theory

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Defense Against Objective Function Attacks in Cognitive Radio networks

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电子学报(英文版) 2011年第1期20卷 138-142页

作者： PEI Qingqi LI Hongning MA Jianfeng FAN Kefeng Ministry of Education Key Laboratory of Computer Network and Information Security Xidian University Xi'an China Institute of China Electronic System Engineering Corporation Beijing China China Electronics Standardization Institute Beijing China

Cognitive radio (CR) is a technology for identifying opportunities using the "spectrum holes" for communication by cognition. Consequently, we can increase spectrum resource utilization rate with CR. However, it is cognition that causes an unprecedented challenge for cognitive radio networks, especially in security performance. Based on security problems existing in cognitive radios, we analyze Objective function attacks in detail. To counter this attack, we propose a multi-objective programming model, called MOP, which verifies all parameters tampered, so that attackers can not prevent CR from adapting to surroundings. Our simulation results indicate that the MOP model can defend Objective function attacks effectively. Thus, with the MOP model based on Particle swarm optimization (PSO), cognitive radio networks will obtain the optimum condition.

关键词：无线电网络防御功能多目标规划模型认知无线电频谱资源安全性能目标函数粒子群优化

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security issues and solutions of the key management protocols in IEEE 802.16j multi-hop relay network*

Security issues and solutions of the key management protocol...

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作者： Fu, Anmin Zhang, Yuqing Feng, Jingyu Key Lab of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China National Computer Network Intrusion Protection Center GUCAS Beijing 100049 China

The recent IEEE 802.16j-2009 adds multi-hop relay capabilities to IEEE 802.16 systems, which aims to offer improved coverage and capacity over single-hop radio access systems. In this paper, we point out several security issues, including non-authenticated privacy and key management messages, insecure relay multicast rekeying algorithm and insecure Multicast and Broadcast Rekeying Algorithm (MBRA), of the key management protocols in IEEE 802.16j-2009 and give some solutions. In particular, we propose a new Secure MBRA (SMBRA) based on identity and logical key tree to solve the security issues of MBRA. SMBRA can not only provide backward and forward secrecy of communications but also avoid key forgery. Furthermore, our theoretical analysis and simulation indicate that SMBRA is much more efficient and adequate, especially in a large group. Copyright © 2011 The Institute of Electronics, information and Communication Engineers.

关键词： Multicasting

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Quantum Secure Direct Communication with Five-Qubit Entangled State

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Chinese Physics Letters 2011年第3期28卷 17-20页

作者： LIN Song GAO Fei LIU Xiao-Fen School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350007 Key Lab of Network Security and Cryptography Fujian Normal UniversityFuzhou 350007 State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876

Recently,a genuine five-qubit entangled state has been achieved by Brown et al.[***.A 38(2005)1119].Later it was indicated that this state can be used for quantum teleportation and quantum state *** we build a quantum secure direct communication protocol with this state,and prove that it is secure in ideal *** the protocol,the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the *** receiver then performs projective determinate measurement to decode the secret message ***,this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.

关键词： conditions capacity quantum

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Recursive representation of transformation matrices of periodic B-spline bases

Recursive representation of transformation matrices of perio...

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2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce, AIMSEC 2011

作者： Pan, Rijing Liu, Xiaofen College of Mathematics and Computer Science Fujian Normal University Key Lab of Network Security and Cryptology Fuzhou China

ISBN: (纸本)9781457705366

With periodic B-spline bases closed B-spline curves can be represented compactly. The transformation matrices of periodic B-spline bases provide a mathematical model for the conversion between different representations of closed B-pline curves and the relevant surfaces. In this paper, we first present the existence conditions for the transformation matrices of periodic B-spline bases. Then we propose and demonstrate a simple recursive formula for the transformation matrices of periodic B-spline bases. © 2011 IEEE.

关键词： Interpolation

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