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8th International ICST Conference on security and Privacy in Communication networks, SecureComm 2012

作者： Wang, Zhiwei College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100190 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China

ISBN: (纸本)9783642368820

P-homomorphic signature is a general framework for computing on authenticated data, which is recently proposed by Ahn et al. With P-homomorphic signature, any third party can derive a signature on the object message m′ from a signature of m, if m′ and m satisfy P(m,m′) = 1 for some predicate P which denotes the authenticatable relationship between m′ and m. Ahn et al. proposed a RSA P-homomorphic signature scheme by using a RSA accumulator, which is very efficient in space. However, the computational cost of verification and derivation is very heavy. We present an improved P-homomorphic signature scheme based on factoring problem. In our construction, the time efficiency of both verification and derivation are much better than Ahn's scheme. © 2013 ICST Institute for computer Science, Social Informatics and Telecommunications Engineering.

关键词： Authentication

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Hybrid relaying and jamming for secure two-way relay networks with passive eavesdroppers

Hybrid relaying and jamming for secure two-way relay network...

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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Hui-Ming Wang Xiang-Gen Xia Qinye Yin Pengcheng Mu School of Electronic and Information Engineering Key Lab for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an Shaanxi P. R. China Department of Electrical and Computer Engineering Chonbuk National University Jeonju DE Korea

Exploiting the idea of cooperative communications is an efficient way to improve the physical-layer security of a wireless transmission in the presence of passive eavesdroppers. In this paper, we propose a hybrid cooperative relaying and jamming scheme to enhance the security of a two-way relay network, where some intermediate nodes help to relay the signal to the legitimate terminals via distributed beamforming and the others jam the eavesdropper simultaneously. In such a way, both two cooperative phases of the data transmission are protected. Subjected to the more practical per-node power constraint of each node and without the channel state information (CSI) of the eavesdropper, we propose a scheme to enhance the secrecy of the two terminals. It is shown that the problem can be transformed into a semidefinite programming (SDP) problem with an additional rank-1 constraint. We then develop a penalty function method and an iterative algorithm to solve such a problem efficiently, instead of the popular semi-definite relaxation (SDR) and randomization techniques proposed in the previous literatures. Simulations show that the proposed hybrid scheme greatly improves the security of the two-way relay networks.

关键词： Relays Jamming security Noise Array signal processing Optimization Wireless communication

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Software structure evaluation based on the interaction and encapsulation of methods

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Science China(Information Sciences) 2012年第12期55卷 2816-2825页

作者： ZHENG QingHua 1,2,OU ZhiJiang 1,2,LIU Ting 1,YANG ZiJiang 3,HOU YuQiao 1,2 & ZHENG Chao 1,2 1 MOE key laboratory for Intelligent networks and network security,Xi'an Jiaotong University,Xian 710049,China 2 shaanxi key laboratory of Satellite-terrestrial network technology R&D,Xi'an Jiaotong University,Xian 710049,China 3 Department of computer Science,Western Michigan University,Michigan,USA 1. MOE Key Laboratory for Intelligent Networks and Network Security Xi’an Jiaotong University Xian 710049 China2. Shaanxi Key Laboratory of Satellite-terrestrial Network Technology R&D Xi’an Jiaotong University Xian 710049 China3. Department of Computer Science Western Michigan University Michigan USA

Software structure is the most important factor affecting the quality of a *** evaluation of software structure is a foundational technique for software ***,the traditional evaluation criteria,such as "high cohesion and low coupling",are no longer appropriate for the new web applications,which are designed with a hierarchical framework.A novel approach is proposed in this paper to evaluate software quality based on the interaction and encapsulation of *** particular,two criteria for high quality software,the functional and hierarchical structure,are proposed to support widely used web *** cohesion and coupling and layer matching ratios between methods within a software package are calculated to determine whether the package is well implemented in terms of functional or hierarchical *** approach enables us to quantify the quality of a software system according to the structural types of its *** were carried out on 18 versions of Struts and six open-source software *** evaluation concurs with the intuition that minor upgrades,aimed at fixing bugs and adding minor functionality quickly,reduce software quality,whereas major upgrades,which normally clean up messy code and re-construct the software,improve software quality.

关键词： software structure evaluation method interaction method encapsulation functional structure hierarchical structure

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Learning to identify core term of knowledge unit from short text

Learning to identify core term of knowledge unit from short ...

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2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2012

作者： Tian, Zhenhua Wang, Zhen Liu, Ziqi Xiang, Hengheng Liu, Jun Zheng, Qinghua Shaanxi Province Key Lab. of Satellite and Terrestrial Network Tech. RandD Department of Computer Science and Technology Xi'An Jiaotong University Shaanxi 710049 China

ISBN: (纸本)9781467300223

We present a new task of identifying core term (CT) of knowledge unit (KU) from text for knowledge management and service. Two kinds of approaches, including binary classification using naïve bayesian, decision tree, logistic regression and SVM, as well as competition learning based on pairwise classification, are investigated for this specific task, combined with presented rich feature set from position, token features to statistic and linguistic features. Experimental results show that simple classification method can effectively address this task with desirable performance at 82.7% KU accuracy. However, since the recognition of core term relies on the KU as an integer and all its inner terms, competition learning based on pairwise classification achieves better result at 89.6%. We also empirically show that all of the presented types of features are useful for our task, and the combination of position and linguistic features is essential for information extraction on short text. © 2012 IEEE.

关键词： Data mining

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Design of distribution transformer monitoring system based on LPC2103

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Journal of Convergence Information technology 2012年第21期7卷 120-126页

作者： Sun, Qindong Wang, Qian Wang, Nan Network Computing and Security Key Lab of Shaanxi Xi'an University of Technology Xi'an 710048 China

Aimed at satisfying the monitoring requirement of distribution transformer, a kind of distribution transformer monitoring system based on LPC2103 is designed. Hardware module and data processing program of the monitoring system are introduced. The SD card of large capacity is used to store data collected by the supervising system, which could support the detail analysis of running status of distribution transformer. A simplified design of electricity cut examination is adopted to decrease the complexity and cost of the system. The system has been used in truth circumstance and the performance of system is satisfactory.

关键词： Monitoring

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A measurement study on potential inter-domain routing diversity

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IEEE Transactions on network and Service Management 2012年第3期9卷 268-278页

作者： Hu, Chengchen Chen, Kai Chen, Yan Liu, Bin Vasilakos, Athanasios V. MoE Key Laboratory of Intelligent Networks and Network Security Department of Computer Science and Techonolgy Xi'An Jiaotong University Xi'an Shaanxi China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong Department of Electrical Engineering and Computer Science Northwestern University Evanston IL United States Department of Computer Science and Technology Tsinghua University Beijing China Department of Computer and Telecommunications Engineering University of Western Macedonia GR 50100 Kozani Greece

In response to Internet emergencies, Internet resiliency is investigated directly through an autonomous system (AS) level graph inferred from policy-compliant BGP paths or/and traceroute paths. Due to policy-driven inter-domain routing, the physical connectivity does not necessarily imply network reachability in the AS-level graph, i.e., many physical paths are not visible by the inter-domain routing protocol for connectivity recovery during Internet outages. We call the invisible connectivity at the routing layer, which can be quickly restored for recovering routing failures by simple configurations, as the potential routing diversities. In this paper, we evaluate two kinds of potential routing diversities, which are recognized as Internet eXchange Points (IXPs) participant reconnection and peering policy relaxation. Using the most complete dataset containing AS-level map and IXP participants that we can achieve, we successfully evaluate the ability of potential routing diversity for routing recovery during different kinds of Internet emergencies. Encouragingly, our experimental results show that 40% to 80% of the interrupted network pairs can be recovered on average beyond policy-compliant paths, with rich path diversities and a little traffic shifts. Thus, this paper implies that the potential routing diversities are promising venues to address Internet failures. © 2004-2012 IEEE.

关键词： Recovery

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The Double-System Architecture for Trusted OS

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Physics Procedia 2012年 25卷 2006-2013页

作者： Yong Zhao Yu Li Jing Zhan College of Computer Science and Technology Beijing University of Technology Beijing 100124 China Key Lab of Information Network Security Ministry of Public Security Shanghai 201204 China

With the development of computer science and technology, current secure operating systems failed to respond to many new security challenges. Trusted operating system (TOS) is proposed to try to solve these problems. However, there are no mature, unified architectures for the TOS yet, since most of them cannot make clear of the relationship between security mechanism and the trusted mechanism. Therefore, this paper proposes a double-system architecture (DSA) for the TOS to solve the problem. The DSA is composed of the Trusted System (TS) and the security System (SS). We constructed the TS by establishing a trusted environment and realized related SS. Furthermore, we proposed the Trusted Information Channel (TIC) to protect the information flow between TS and SS. In a word, the double system architecture we proposed can provide reliable protection for the OS through the SS with the supports provided by the TS.

关键词： Double System Architecture Trusted Information Channel Trusted Operating System Trusted Computing

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The Double-System Architecture for Trusted OS

The Double-System Architecture for Trusted OS

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2012 International Conference on Solid State Devices and Materials Science(SSDMS 2012)

作者： Yong Zhao Yu Li Jing Zhan College of Computer Science and Technology Beijing University of Technology Key Lab of Information Network Security Ministry of Public Security

With the development of computer science and technology, current secure operating systems failed to respond to many new security challenges. Trusted operating system(TOS) is proposed to try to solve these problems. However, there are no mature, unified architectures for the TOS yet, since most of them cannot make clear of the relationship between security mechanism and the trusted mechanism. Therefore, this paper proposes a double-system architecture(DSA) for the TOS to solve the problem. The DSA is composed of the Trusted System(TS) and the security System(SS). We constructed the TS by establishing a trusted environment and realized related SS. Furthermore, we proposed the Trusted Information Channel(TIC) to protect the information flow between TS and SS. In a word, the doublesystem architecture we proposed can provide reliable protection for the OS through the SS with the supports provided by the TS.

关键词： Double System Architecture Trusted Information Channel Trusted Operating System Trusted Computing

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Research on Separation of Three Powers Architecture for Trusted OS

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Physics Procedia 2012年 25卷 1168-1175页

作者： Yu Li Yong Zhao Siyuan Xin College of Computer Science and Technology Beijing University of Technology Beijing 100124 China Key Lab of Information Network Security Ministry of Public Security Shanghai 201204 China Institute of Electronic Technology the PLA Information Engineering University

The privilege in the operating system (OS) often results in the break of confidentiality and integrity of the system. To solve this problem, several security mechanisms are proposed, such as Role-based Access Control, Separation of Duty. However, these mechanisms can not eliminate the privilege in OS kernel layer. This paper proposes a Separation of Three Powers Architecture (STPA). The authorizations in OS are divided into three parts: System Management Subsystem (SMS), security Management Subsystem (SEMS) and Audit Subsystem (AS). Mutual support and mutual checks and balances which are the design principles of STPA eliminate the administrator in the kernel layer. Furthermore, the paper gives the formal description for authorization division using the graph theory. Finally, the implementation of STPA is given. Proved by experiments, the Separation of Three Powers Architecture we proposed can provide reliable protection for the OS through authorization division.

关键词： Separation of Three Powers Architecture Authorization Graph Separation of Privilege Trusted Operating System

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MOEA/D with iterative thresholding algorithm for sparse optimization problems

MOEA/D with iterative thresholding algorithm for sparse opti...

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12th International Conference on Parallel Problem Solving from Nature, PPSN 2012

作者： Li, Hui Su, Xiaolei Xu, Zongben Zhang, Qingfu Institute for Information and System Sciences Key Lab. for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an Shaanxi 710049 China School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park Colchester CO4 3SQ United Kingdom

ISBN: (纸本)9783642329630

Currently, a majority of existing algorithms for sparse optimization problems are based on regularization framework. The main goal of these algorithms is to recover a sparse solution with k non-zero components(called k-sparse). In fact, the sparse optimization problem can also be regarded as a multi-objective optimization problem, which considers the minimization of two objectives (i.e., loss term and penalty term). In this paper, we proposed a revised version of MOEA/D based on iterative thresholding algorithm for sparse optimization. It only aims at finding a local part of trade-off solutions, which should include the k-sparse solution. Some experiments were conducted to verify the effectiveness of MOEA/D for sparse signal recovery in compressive sensing. Our experimental results showed that MOEA/D is capable of identifying the sparsity degree without prior sparsity information. © 2012 Springer-Verlag.

关键词： Multiobjective optimization

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