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检索条件"机构=State Key Lab. of Virtual Reality Technology and System School of Computer Science and Technology"

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Network penetration testing scheme description language

Network penetration testing scheme description language

引用

2011 International Conference on Computational and Information sciences, ICCIS 2011

作者： Dai, Zhiyong Lv, Liangshuang Liang, Xiaoyan Bo, Yang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

Penetration testing is widely used to help ensure the security of the network. Traditional penetration testings were manually performed by tester according to scheme, the process is usually complex resulting in that it is lab.r-intensive and requires tester to be familiar with all kind of tools. So it is very desirable to use a unified method to describe the scheme which can be identified by computer, then the computer can be used to substitute for tester to perform penetration testing. A new method is presented to describe penetration testing scheme. We propose a language for tester to describe the penetration testing scheme. Based on the conceptual model of penetration testing scheme we design the penetration testing scheme description language (PTSDL) and outline the important EBNF. PTSDL is declarative abstracting the process of penetration testing which makes this language flexible, extensible and adaptable to new penetration testing method. Use of this language is illustrated by an experimental study, which shows that the language can effectively describe the penetration testing scheme. © 2011 IEEE.

关键词： Testing

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The research of 3D computer graphics on mobile devices

The research of 3D computer graphics on mobile devices

引用

computer Graphics and Visualization 2008 and Gaming 2008: Design for Engaging Experience and Social Interaction 2008, MCCSIS'08 - IADIS Multi Conference on computer science and Information systems

作者： Xiaohui, Liang Qidi, Xu Xiaoxiao, Wu Zhiying, He State Key Lab. of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing 100083 China

ISBN: (纸本)9789728924638

It is a challenging task to provide real-time, realistic 3D graphics on mobile devices because of the constraints of computing, storage and network bandwidth. In this paper, we first overview current researches of 3D graphics on mobile devices, and present our methods for modeling and rendering on mobile devices and finally give some experiments of our work. © 2008 IADIS.

关键词： Information use

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Automatic generation for penetration testing scheme analysis model for network

Automatic generation for penetration testing scheme analysis...

引用

2011 International Conference on Computational and Information sciences, ICCIS 2011

作者： Shen, Lu Liang, Xiaoyan Bo, Yang Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

The existing penetration testing systems need to rely on the professional skills in the testing process, so they increase the penetration testing of human resources and costs. While it also reduces the efficiency of the test, it increases the test cycle. This paper presents a new penetration testing scheme by an automatically generated method. Through penetration testing scheme description, we establish an automatic generation system about penetration testing scheme, and the automatic generation penetration testing scheme for network analysis model (AGPTSAM) is established, and then the termination of the AGPTSAM is proved by the pushdown automaton. The prototype system of AGPTSAM is implemented. The penetration testing scheme could provide guidance and basis for the implementation of the penetration testing system, and shorten the test cycle and the human resources cost. This method is verification of effectiveness by experimental which works on the implementing platform. © 2011 IEEE.

关键词： Analytical models Automatica Generation Computational modeling Information security Penetration Testing Prototypes Scheme Testing

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Conflict detection model of access control policy in collab.rative environment

Conflict detection model of access control policy in collabo...

引用

2011 International Conference on Computational and Information sciences, ICCIS 2011

作者： Fan, Beibei Liang, Xiaoyan Luo, Yang Bo, Yang Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

Cross-domain interoperation based on role-mapping increasingly becomes a representative research field of collab.rative environment. However, in this collab.rative environment, there would still be more permission or less than the role of role-mapping policy required when authorization, this situation can not be completely avoided. This disaccord will result in conflict of access control policies (ACPs) in collab.rative domains, and ultimately lead to unauthorized access to resources in autonomy domains. A new method is presented to detect the conflict between access control policies in collab.rative environment automatically. The ACPs conflict detection model (ACPCDM) is established, the termination of ACPCDM is proved by the putdown automation, and the prototype system is implemented. At last, we validate the validity of this method with experiments, the result of the experiments shows that the analysis report of conflict can not only detect if there is conflict, but also figure out the conflict type, the causes and location of the conflict. So it is much easier for administer in each domain to resolve the conflict. © 2011 IEEE.

关键词： Mapping

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Accelerate cache simulation with generic GPU

Accelerate cache simulation with generic GPU

引用

IEEE 9th International Conference on computer and Information technology, CIT 2009

作者： Han, Wan Xiaopeng, Gao Zhiqiang, Wang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769538365

Trace-driven cache simulation is the most widely used method to evaluate different cache structures. Several techniques have been proposed to reduce the simulation time of sequential trace-driven simulation. An obvious way to achieve fast parallel simulation is to simulate the individual independent sets of a cache concurrently on different compute resources. We propose improvements to current trace-driven simulation methods to make them faster and more economical. This paper considers the use of generic GPU to accelerate cache simulation which exploits set-partitioning as the main source of parallelism. We develop more efficient parallel simulation techniques by introducing more knowledge into the Compute Unified Device Architecture (CUDA) on the GPU. Our experimental result shows that the new algorithm can produce performance results for a number of set-associative caches in just a single simulation run and still produce the exact results. © 2009 IEEE.

关键词： Graphics processing unit

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A Network Security Situation Analysis framework based on information fusion

A Network Security Situation Analysis framework based on inf...

引用

2011 6th IEEE Joint International Information technology and Artificial Intelligence Conference, ITAIC 2011

作者： Zhang, Songmei Yao, Shan Ye, Xin'En Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781424486236

With the rapid development of the Internet, the network structure becomes larger and more complicated and attacking methods are more sophisticated, too. To enhance network security, Network Security Situation Analysis (NSSA) technology is a research hot spot in the network security domain. But at present, the NSSA framework and model which not only analyze the affected results of the network security but also the process how the network security is affected are less. In this paper, a novel NSSA framework is presented. The framework includes two parts: calculate the Network Security Situation Value (NSSV) and discover intrusion processes. NSSA quantitative assesses the impact on network security caused by attacks upon Analytical Hierarchy Process (AHP) and hierarchical network structure. Based on attack classification, intrusion processes discover the process how network security is affected. At last from the experiments results, NSSV exactly changes as attacks take place and the accurate intrusion processes are discovered. The applicability of the framework and algorithms are verified. © 2011 IEEE.

关键词： Network security

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Seamless virtual machine live migration on network security enhanced hypervisor

Seamless virtual machine live migration on network security ...

引用

2009 2nd IEEE International Conference on Broadband Network and Multimedia technology, IEEE IC-BNMT2009

作者： Xianqin, Chen Han, Wan Sumei, Wang Xiang, Long State Key Laboratory of Virtual Reality Technology System School of Computer Science and Technology Beijing University of Aeronautics and Astronautics Beijing 100191 China

ISBN: (纸本)9781424450053

Since the virtual network traffic is invisible outside the hypervisor, it is impossible for traditional network-base security devices to harness the attacks happened in virtual computing environment. Industry and academies adopt the network security enabled hypervisor (NSE-H) to protect virtual machines (VM) residing in the virtual network. In this paper, we identified the insufficiency of the existing live migration implementation, which prevents itself from providing transparent VM relocation between NSE-Hs. This occurs because the contemporary migration implementation only takes VM encapsulated states into account, but ignores VM related security context(SC) needed by NSE-H embedded security engines (SE). We presented a comprehensive live migration framework for the NSE-H, considering both the execution context encapsulated in VM instance and the VM related security context within the SEs. We built a prototype system of the framework based on stateful firewall enabled Xen hypervisor. Our experiment was performed with realistic applications and the results demonstrate that the solution complements the insufficiency without introducing significant performance downgrade. Even in the worst case, the downtime that occurs during migration increases no more than 15%, comparing to existing implementation. ©2009 IEEE.

关键词： Network security

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Accelerate Smoothed Particle Hydrodynamics using GPU

Accelerate Smoothed Particle Hydrodynamics using GPU

引用

2010 IEEE Youth Conference on Information, Computing and Telecommunications, YC-ICT 2010

作者： Gao, Xiaopeng Wang, Zhiqiang Wan, Han Long, Xiang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University 100191 Beijing China

ISBN: (纸本)9781424488841

Physic-based fluid simulation is used extensively nowadays;however the traditional serial algorithm can't satisfy the realtime requirement due to its complexity and compute-intensive. The development of modern GPU makes this possible. In this paper, a Smoothed Particle Hydrodynamics (SPH) method for incompressible fluid was implemented using CUDA on GPU. Since the algorithm was executed on the GPU entirely, the method can take full advantage of massive computational power of modern graphics hardware. The experiment results show that our GPU based SPH implementation can achieve the rate of 89 frames per second in the simulation of 102K particles and gain nearly 140x speedups compared with the serial algorithm. © 2010 IEEE.

关键词： Graphics processing unit

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SimRC: An architecture modeling and simulator generation tool for reconfigurable computing development

SimRC: An architecture modeling and simulator generation too...

引用

IASTED International Conference on Modelling, Simulation, and Identification, MSI 2009

作者： Liu, Yuexiao Gao, Xiaopeng Wu, Xingbo Lv, Liangshuang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9780889868106

A modeling and simulation tool called SimRC is described in this paper. It is dedicated to improve the efficiency of reconfigurable computing development. In SimRC, a new architecture description language is designed for architecture modeling, and the target architecture simulator is generated according to that model with our code generation approach. In this way, SimRC achieves the general purpose in a certain scope. The results of the preliminary experiments show that not only SimRC is able to model various architectures, but also it achieves the high simulation efficiency.

关键词： Simulators

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Simplification for texture mapping models with mesh segmentation

Simplification for texture mapping models with mesh segmenta...

引用

2010 16th International Conference on virtual systems and Multimedia, VSMM 2010

作者： Wang, Lili Ma, Zhiqiang Xue, Bing Shen, Zhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing 100191 China

ISBN: (纸本)9781424490264

To reduce the loss of visual details in simplification for textured meshes, this paper presents a simplification method based on mesh segmentation. Firstly, the model is partitioned into some sub-meshes according to their properties of appearance, such as texture, normal, etc. Thus, the correlation between sub-meshes can be decreased. Then, we calculate the error metric for the edge collapse in each sub-mesh. Lastly, we merge the simplified sub-meshes and fix the gap among them to regain an integrated mesh. Because the properties of appearance are used to separate the high-frequency details from low-frequency ones, our approach decreases the loss of the detailed. Therefore, we can not only keep the over whole contours of the model, but also maintain better geometric and appearance details. The results of experiments demonstrate our mesh segmentation based method is effective. ©2010 IEEE.

关键词： Mesh generation

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