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The Fifth International Conference on information Assurance and security(第五届信息保障与安全国际会议)

作者： Kai Fan Hui Li Yue Wang Ministry of Edu.Key Lab.of Computer Network and Information Security Xidian University Xi'an Shaanxi Xi'an Branch of Shaanxi Telecom Ltd.Xi'an ShaanxiChina

ISBN: (纸本)9781424451012

To solve the problem of the abuse in electronic payment protocols, a new abuse-free fair electronic payment protocol is proposed in this paper. The proposed protocol solves the problems in Parks'protocol and furthermore it solves the abuse using off-line trusted third party (TTP). The security and fairness are also possessed in the protocol.

关键词： Electronic payment Payment protocol Fairness Abuse-free Off-line TTP

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A link analysis for passive UHF RFID system in LOS indoor environment

A link analysis for passive UHF RFID system in LOS indoor en...

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2008 International Conference on Wireless Communications, networking and Mobile Computing, WiCOM 2008

作者： Hong, Gang Wang Chang, Xing Petitioner Chang, Hua Zhu Ministry of Education Key Lab. Computer Network and Information Security Xidian University Xi'an China

ISBN: (纸本)9781424421084

A link analysis model for passive UHF RFID system in LOS indoor environment is developed and demonstrated. Using this model, the power received by tag and the read performance are investigated. The multipath fading and RMS delay spread for UHF RFID system are analyzed by a 5-ray model with different polarization, e.g., horizontal polarization, vertical polarization, and circular polarization. A practical test is developed on an indoor balcony of an office building. In addition, the electric field environment is simulated using the tool of Ansoft HFSS for the analysis of multipath degradation. The results of theoretical analysis, simulation and test are almost conformable, and the small scale fading and the field nulls are observed. Multipath degradation affects the UHF RFID system so much on read performance, and it is still a key limitation on system performance. More research on anti-multipath interference should be developed, e.g., high gain antenna, high sensitivity tag and reader receiver, and more effective protocols, and so on. © 2008 IEEE.

关键词： Time delay

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Attack-tolerant node localization in wireless sensor networks

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2008年第7期30卷 111-115页

作者： Ye, A-Yong Ma, Jian-Feng Key Lab. of the Ministry of Education for Computer Networks and Information Security Xidian University Xi'an 710071 China Key Lab. of the Network Security and Cryptology Fujian Normal University Fuzhou 350007 China

It is essential to ensure that sensors can determine their location for wireless sensor networks. However, most of existing location discovery protocols became vulnerable in the presence of malicious attacks. So the authors presented an attack-tolerant node localization algorithm called AtLoc. In AtLoc, a least safe reference set was randomly built up according to the unbiased estimation of variance. Based on this, prediction residual of the least safe reference set was used to stepwise diagnose the remained references were abnormal or not, which significantly enhanced the resilience of localization system against attacks. Finally, the authors provided theoretical analysis and simulations to evaluate the proposed techniques.

关键词： Node localization security Wireless sensor networks

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Linear programming models for jamming attacks on network traffic flows

Linear programming models for jamming attacks on network tra...

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International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless networks (WiOpt)

作者： Patrick Tague David Slater Radha Poovendran Guevara Noubir Network Security Lab (NSL) Department of Electrical Engineering University of Washington Seattle WA USA College of Computer and Information Science Northeastern University Boston MA USA

ISBN: (纸本)9781424431212

We present a new class of network attacks, referred to as flow-jamming attacks , in which an adversary with multiple jammers throughout the network jams packets to reduce traffic flow. We propose a linear programming framework for flow-jamming attacks, providing a foundation for the design of future protocols to mitigate flow-jamming. We propose metrics to evaluate the effect of a flow-jamming attack on network flow and the resource expenditure of the jamming adversary. We develop, evaluate, and compare a variety of flow-jamming attacks using the proposed metrics and the linear programming formulation. In addition, we formulate two approaches for distributed flow-jamming attacks for a set of jammers operating without centralized control and compare the performance to the centralized attacks using the linear programming formulation.

关键词： Linear programming Jamming Telecommunication traffic Traffic control Protocols computer crime US Government information security Centralized control Spread spectrum communication

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A Fine-Grained Digital Rights Transfer Policy and Trusted Distribution and Enforcement

A Fine-Grained Digital Rights Transfer Policy and Trusted Di...

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International Conference on Computational Intelligence and security

作者： Zhiyong Zhang Qingqi Pei Jianfeng Ma Lin Yang Kefeng Fan Key Lab of Computer Network & Information Security (Ministry of Education) Xidian University Xi'an Shaanxi China Electron. Inf. Engineering Coll. Henan University of Science and Technology Luoyang Henan China Research Institute China Electronic Equipment and Systems Engineering Corporation Beijing China China Electronics Standardization Institute Beijing China

ISBN: (纸本)9781424441969

Existing digital rights management (abbr. DRM) approaches lack a flexible fine-grained digital rights transfer policy, also could not guarantee the trustworthy distribution and enforcement of the transferable rights policy by using DRM agent. First, descriptions of extensible ODRL-based rights transfer policy were presented to complete OMA REL. Then, we introduced a remote attestation mechanism among entities, such as RI and DRM agent, based on trusted computing platform in order to implement trusted distribution and enforcement of the policy, also mainly proposed trustworthy distribution protocols of the rights object and transfer, as well as a trusted policy enforcement protocol. Final, the approach is made comparison with existing DRM schemes as to several functionality aspects on transferable rights granularity, restricted sharing, temporal limitation, trust of DRM agent. A conclusion is drawn that the proposed scheme is not restricted within local domain environment, and accomplishes fine-grained rights transfer and contents sharing between users without direct participations of rights issuer or local domain manager.

关键词： Protocols Content management information security Licenses Computational intelligence computer security computer networks computer science education Electrons Electronic equipment

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Study of distinguishing attack on a new type nonlinear filter generator

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Tongxin Xuebao/Journal on Communications 2007年第SUPPL.期28卷 151-154页

作者： Wu, Li-Hua Li, Yuan Hu, Yu-Pu Key Lab. of Computer Network and Information Security Xidian Univ. Xi'an 710071 China

Based on the theory of hypothesis testing the security of a new type nonlinear filter generator was studied, which consists of non-linear source, linear feedback shift register and filter Boolean functions. The result shows that this stream cipher structure has potential security weakness when the design of the filter Boolean function is improper.

关键词： Cryptography

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Survivable storage networks and Quorum system

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Tongxin Xuebao/Journal on Communications 2007年第SUPPL.期28卷 121-124页

作者： Zhang, Wei Ma, Jian-Feng Liu, Shu-Guang Wang, Chao Key Lab. of Computer Network and Information Security Xidian Univ. Xi'an 710071 China Engineering Institute of the Armed Police Xi'an 710086 China

A survivable storage architecture was provided based on an overall study of storage service survivability. It contains storage nodes, users, access control system, reliability analysis module, intrusion and fault detection modules. The notion of threshold Byzantine Quorum system (TBQS) was presented grounded on this architecture. TBQS can be used together with erasure coding or threshold schemes to design survivable storage systems. Storage systems based on TBQS can tolerant 1/4 faulty nodes and thus provide a solid data service.

关键词： Access control

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A minimum motion vector span criteria based error concealment algorithm for entire frame losses in H.264

A minimum motion vector span criteria based error concealmen...

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25th PCS: Picture Coding Symposium 2006, PCS2006

作者： Liu, Li Yang, Gaobo Sun, Tao Network and Information Security Lab. School of Computer and Communication Hunan University Changsha Hunan 410082 China

ISBN: (纸本)300018726X

In low bit-rate video communication, a coded picture may fit the payload size of one IP packet, especially for the latest video coding standard H.264. Thus, the loss of a packet may result in the loss of a whole video frame. To deal with this kind of packet losses, an error concealment algorithm in the H.264 decoder for whole-frame losses, which is based on a minimum motion vector span, is proposed in this paper. The motion vectors of lost frame are predicted by utilizing the principle of optical flow, and then the lost frame is reconstructed based on the minimum motion vector span. Experimental results on several test sequences show that the proposed approach can effectively reconstruct the lost frame, both in better objective and subjective image quality.

关键词： Image coding

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Analysis of information Leakage in Quantum Key Agreement

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Journal of Shanghai Jiaotong university(Science) 2006年第2期11卷 219-223页

作者：刘胜利郑东陈克非 Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 ChinaLab. of Computer Network and Information Security Xidian Univ. Xi'an 710071 Computer Science and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

Quantum key agreement is one of the approaches to unconditional security. Since 1980’s, different protocols for quantum key agreement have been proposed and analyzed. A new quantum key agreement protocol was presented in 2004, and a detailed analysis to the protocol was given. The possible game played between legitimate users and the enemy was described: sitting in the middle, an adversary can play a “man-in-the-middle” attack to cheat the sender and receiver. The information leaked to the adversary is essential to the length of the final quantum secret key. It was shown how to determine the amount of information leaked to the enemy and the amount of uncertainty between the legitimate sender and receiver.

关键词： quantum key agreement analysis

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Survival of the internet applications: A cluster recovery model

Survival of the internet applications: A cluster recovery mo...

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6th IEEE International Symposium on Cluster Computing and the Grid, 2006. CCGRID 06

作者： Aung, Khin Mi Mi Park, Kiejin Park, Jong Sou Network Security and System Design Lab. Computer Engineering Dept. Hankuk Aviation University Korea Republic of Division of Industrial and Information System Engineering Ajou University Korea Republic of Computer Engineering Dept. Hankuk Aviation University Korea Republic of

ISBN: (纸本)0769525857

Internet applications become increasingly widely used for millions of people in the world and on the other hand the accidents or disruptions of service are also dramatically increasing. Accidents or Disruptions occur either because of disasters or because of malicious attacks. The disasters could not be completely prevented. Prevention is a necessary but not a sufficient component of disaster. In this case, we have to prepare thoroughly for reducing the recovery time and get the users back to work faster. In this paper, we present a cluster recovery model to increase the the survivability level of Internet applications. We construct a state transition model to describe the behaviors of cluster systems. By mapping through recovery actions to this transition model with stochastic process, we capture system behaviors as well as we get mathematical steady-state solutions of that chain. We first carry out for steady-state behaviors leading to measures like steady-state availability. By transforming this model with the system states we compute a system measure, the mean time to repair (MTTR) and also compute probabilities of cluster systems failures due in face of disruptions. Our model with the recovery actions have several benefits, which include reducing the time to get the users back to work and making recovery performance insensitive to the selection of a failure treatment parameter. © 2006 IEEE.

关键词： Internet

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