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IEEE International Conference on Computer-Aided Design and Computer Graphics

作者： Jiating Chen Bin Wang Department of Computer Science and Technology Tsinghua University Beijing China Ministry of Education Key Laboratory of Information System Security Beijing China School of Software Tsinghua University Beijing China Tsinghua National Laboratory for Information Science and Technology Beijing China

In the past, several approaches have been proposed to produce high quality solid textures. Unfortunately, they often suffer from several synthesis artifacts, such as color blurry, bad texture structures, introducing aberrant voxel colors and so on. In this paper, we present a novel algorithm for synthesizing high quality solid textures from 2D exemplars. We adopt an optimization framework with the k-coherence search and the discrete solver for solid texture synthesis. The texture optimization approach is integrated with a new kind of histogram matching, position histogram matching, which effectively causes the global statistics of the synthesized solid textures to match those of the exemplars. Experimental results show that our synthesized results do not suffer from color blurry, and most texture structures are preserved well, outperforming the previous solid texture synthesis algorithms in terms of the synthesis quality.

关键词： Histograms Solid modeling Surface texture Educational technology Laboratories Principal component analysis software quality Computer science Information systems Computer security

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DYNAMIC DATA FLOW GRAPH-BASED software WATERMARKING

DYNAMIC DATA FLOW GRAPH-BASED SOFTWARE WATERMARKING

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2009 IEEE International Conference on Network Infrastructure and Digital Content(2009年IEEE网络基础设施与数字内容国际会议 IEEE IC-NIDC2009)

作者： Xinxin Niu Zhengming Hu Bo Feng Miao Zhang Guoai Xu Information Security Center State Key Laboratory of Networking and Switching Technology Beijing Un Key Laboratory of network and information attack & defense technology of MOE Beijing University of National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Te

ISBN: (纸本)9781424448999

In this paper we indicate the concept of Dynamic Data Flow Graph based on the dynamic data dependency during execution of software. On this basis, we propose a dynamic software watermarking algorithm, which embeds watermarking information into DDFG of software, and discuss the implementation of embedding and extracting watermark. Finally we analyze the performance of this algorithm.

关键词： software Watermarking Dynamic Watermarking Dynamic Data Flow Graph

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An efficient fair off-line E-cash system based on a fully hierarchical proxy blind signature

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Journal of Information and Computational Science 2009年第1期6卷 407-414页

作者： Tan, Zuowen School of Information Technology Jiangxi University of Finance and Economics Nanchang 330013 China State Key Laboratory of Information Security Institute of Software CAS Beijing 100190 China Jiangxi Research Center of E-Commerce Engineering and Technology Nanchang 330013 China

We design a fully hierarchical proxy blind signature scheme. Then we propose an efficient fair off-line electronic cash system based on the fully hierarchical proxy blind signature scheme with provable security. Our electronic cash system ensures traceability of double spenders without the trusted party. The electronic cash system can provide more flexibility in the real world. To the best of our knowledge, this is the first result to implement a fair off-line electronic cash system in the hierarchical situation. © 2009 Binary Information Press.

关键词： Electronic money

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Synthesis of 3D Aging Faces Based on Color Gabor Wavelet and Texture Transplant

Synthesis of 3D Aging Faces Based on Color Gabor Wavelet and...

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International Conference on Computational Intelligence and software engineering (CiSE)

作者： Huilin Si Dehui Kong Baocai Yin Beijing Key Laboratory of Multimedia and Intelligent Software Technology College of Computer Beijing University of Technology Beijing China College of Computer Science and Information Engineering Beijing Technology and Business University Beijing China

Facial aging synthesis is one of the main topics in computer graphics. This paper proposes a synthetic approach to 3D aging faces by using color Gabor wavelet and texture transplant techniques. Based on 3D aging templates, the color Gabor wavelet transform is carried out first to extract the high-frequency sub-images from the texture maps, in which is contained the texture feature of aging skin. Then the corresponding sub-images of target facial images are replaced and fused. The transplant of aging texture towards target face is finally achieved through wavelet reconstruction. The experimental results show that the aging features can be extracted effectively by wavelet transform and be used to synthesize the 3D aging face of the target face.

关键词： Aging Facial animation Skin Solid modeling Muscles Educational institutions Computer science Computer graphics Wavelet transforms Computational modeling

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Minimising Native Interference in Still Image Data Hiding

Minimising Native Interference in Still Image Data Hiding

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WRI International Conference on Communications and Mobile Computing, CMC

作者： Jian Jun Guo Xin Xu Zhao Feng Ma Jian Yin Zhang Beijing Key Laboratory of Multimedia and Intelligent Software Technology College of Computer Science and Technology Beijing University of Technology Beijing China Information Security Centre Beijing University of Posts and Telecommunications Beijing China Digital Video Networks (Beijing) Company Limited Beijing China

The technique of using orthogonal sequences to embed digital watermarks is described. It is shown that embedding with sequences which are orthogonal to the cover image can enhance the detection reliability and improve the system performance and robustness compared to using random sequences. Algorithms to generate such orthogonal sequences are introduced and the performance results are compared. Results indicate that the more than 1000 bit payload is realised for printed photographs (512 times 512 pixels).

关键词： Interference Data encapsulation Watermarking Maximum likelihood detection Poles and towers Robustness Frequency Jamming Mobile communication Mobile computing

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The reaction path of CO and Fe2O3 in a chemical-looping combustion system

The reaction path of CO and Fe2O3 in a chemical-looping comb...

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International Conference on Sustainable Power Generation and Supply, SUPERGEN

作者： Xiaolei Zhang Changqing Dong Junjiao Zhang Dalong Jiang Yongping Yang National Engineering Laboratory for Biomass Power Generation Equipment Beijing Key laboratory of security & clean energy technology North China Electric Power University Beijing China

The reaction mechanism of CO and Fe 2 O 3 in a chemical-looping combustion (CLC) was studied based on density functional theory (DFT) at B3LYP level in this paper. The structures of all reactants, intermediate, transition structures and products of this reaction had been optimized and characterized. The reaction path was validated by means of the intrinsic reaction coordinate (IRC) approach. The result showed that the reaction was divided into two steps, the adsorbed CO molecule on Fe 2 O 3 surface formed a medium state with one broken Fe-O bond in step1, and in step2, O atom broken here oxidized a subsequent CO molecule in the fuel reactor. Thus, Fe 2 O 3 molecule transport O from air to oxide CO continually in the CLC process. The activation energy and rate coefficients of the two steps were also obtained.

关键词： Iron Fuels Combustion Inductors Costs Power generation Geometry Frequency Chemicals Bonding

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TBDRM: A TPM-Based Secure DRM Architecture

TBDRM: A TPM-Based Secure DRM Architecture

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IEEE International Conference on Computational Science and engineering, CSE

作者： Aimin Yu Dengguo Feng Ren Liu National Engineering Research Center for Information Security Beijing China State Key Laboratory of Information Security Institute of Software Chinese Academy and Sciences Beijing China School of Business Administration North China Electric Power University Beijing China

Digital rights management (DRM) is the technological solution to control the distribution and usage of digital assets. However, existing solutions are vulnerable to various attacks in the context where the consumer can control the platform totally. To improve the security of DRM solutions the paper proposes a secure DRM architecture based on TPM which is called TBDRM. It ensures that content is always under the control of the license and such license is secure and fresh during its lifecycle. Compared with other DRM solutions, TBDRM can prevent replay attack and improper access enforced through cracked software.

关键词： Licenses Protection Computer architecture Cryptography Power engineering and energy Information security Asset management technology management Hardware National security

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A NEW CREDENTIAL ROUTING MODEL BASED ON TRUST THEORY

A NEW CREDENTIAL ROUTING MODEL BASED ON TRUST THEORY

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2009 IEEE International Conference on Network Infrastructure and Digital Content(2009年IEEE网络基础设施与数字内容国际会议 IEEE IC-NIDC2009)

作者： Daofeng Li Lize Gu Bin Sun Xinxin Niu Yixian Yang Information Security Center State Key Laboratory of Networking and Switching Technology Key Laboratory of network and information attack & defense technology of MOE National Engineering Laboratory for Disaster Backup and RecoveryBeijing University of Po

Router has acted as more and more important role in the large-scale network. In the meantime, the security of the router become more seriously. In this paper, we propose a new algorithm to decide a credential routing path from the start router to the end one based on the trust theory that considers the trustworthy of link, the cost of link and the trustworthy of router as the critical factors so as to utilize the principle of the grey correlation degree to obtain a credential routing path, instead of weighted mean in existed methods of trust measurement. We guarantee that packet can secure transfer under the credential routing path and identify the remote routers that are subject to attacks.

关键词： IP network Credential routing path trust theory grey correlation analysis

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An access-context based method to detect network scanning event in LAN

An access-context based method to detect network scanning ev...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Di Wu Ping Yin Xiao-Hua Chen Ning Bu State Key Laboratory of Information Security Institute of Software Chinese Academy and Sciences Beijing China Electronic Engineering Department Shanghai Jiaotong University Shanghai China China Information Security Certification Center Beijing 100020 China

Usually there are leading DNS resolution operations in normal network access scenarios and at the same time the relative connection success ratio is very high; but there is no leading DNS resolution operation in network scanning scenarios and the relative connection success ratio is very low. For convenience in this paper we named the network access connection attempt without leading DNS resolution operation as Suspicious Network Access (SNA). A network scanning detection approach is proposed in this paper by the analysis of SNAs' response ratio and the randomness of their target IP addresses for each host in LAN. Since the proposed approach only takes the SNAs into account and the interference from normal network access can be decreased effectively, it can detect network scanning attacks with high accuracy and efficiency. The experiment results in simulation network scenario showed that the proposed approach support the detection of TCP-SYN and ICMP type network scanning attacks and also support the detection of stealth network scanning attacks as well.

关键词： Event detection Local area networks Machine learning Cybernetics

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A Static Method for Detection of Information Theft Malware

A Static Method for Detection of Information Theft Malware

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Second International Symposium on Electronic Commerce and security(第二届电子商务与安全国际研究大会)(ISECS 2009)

作者： Tao Wei JiaJing Li Wei Zou Jian Mao Key Laboratory of Network and Software Security Assurance Peking University Ministry of Education B Department of Electronic and Information Engineering of BeiHang University Beijing 10083 China

ISBN: (纸本)9781424442843

Existing techniques based on behavior semantics for information theft malware detection have the main shortcomings of low path coverage and disability of finding hidden malicious behaviors. In this paper we propose a static method for the detection of information theft malware to overcome these shortcomings. It is particularly efficienct for inter-procedure taint analysis, and it is suitable for complicated malware detection, such as Trojan and Bot. Its static style makes it able to find hidden malicious behaviors. We also present an implementation of our method that works on x86 executables and a set of experimental studies validate its good efficiency and effectiveness.

关键词： malware detection information theft taint analysis pushdown system

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