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Recovery of hierarchical styling features from images

Journal of Information and Computational Science 2013年第7期10卷 1907-1916页

作者： Li, Baojun Li, Qingbao Liu, Chong Liu, Mingzeng Hu, Ping Liu, Xiuping School of Automotive Engineering Faculty of Vehicle Engineering and Mechanics Dalian University of Technology Dalian 116024 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha 410082 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China School of Mathematical Science Dalian University of Technology Dalian 116024 China

In this paper, we propose a model-based reconstruction method for recovering a 2D parametric styling model with hierarchical structure from an image. Our method extracts characteristic features for industrial design with following essential components: construction of the template database as prior knowledge, contour detection from images and layered segmentation, key points generation via shape correspondence with reference model, sparse reconstruction based on shape space and hierarchical fitting. The whole recovery process is semi-automatic. We adopt the challenging vehicle styling as test examples, and establish associated styling model database. Numerical experiments show that our method is effective to recover the styling features with high precision and hierarchical structure. We also give an image reshaping application based on our hierarchical features. © 2013 by Binary Information Press.

关键词： Recovery

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The process analysis of encryption and decryption based on process dependency graphs

The process analysis of encryption and decryption based on p...

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2013 International Conference on Sport Science and Computer Science (CCCS 2013)

作者： Rui Chang Liehui Jiang Hongqi He Yun Zeng State Key Laboratory of Mathematic Engineering and Advanced Computing

At present,the research on reverse analysis of encrypting and decrypting process pays more attention to cryptographic algorithms *** is no mature theory or tools for the entire process analysis of encryption and *** order to solve the problem efficiently,this paper discusses encryption and decryption process dependency graphs,summarizes the existing research results about the cryptographic algorithms recognition technology,and explores a way to research the process analysis of encryption and decryption based on process dependency ***,the result on an example reveals the entire process analysis of encryption and decryption.

关键词： encryption and decryption reverse analysis process dependency graphs

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Fixing the sender-equivocable encryption scheme in eurocrypt 2010

Fixing the sender-equivocable encryption scheme in eurocrypt...

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5th IEEE International Conference on Intelligent Networking and Collaborative Systems, INCoS 2013

作者： Huang, Zhengan Liu, Shengli Qin, Baodong Chen, Kefei Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China College of Computer Science and Technology Southwest University of Science and Technology Mianyang China School of Science Hangzhou Normal University Hangzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi China

ISBN: (纸本)9780769549880

There are two main approaches to achieve selective opening chosen-cipher text security (SO-CCA security): lossy encryption (including all-but-many lossy trapdoor functions) and sender-equivocable encryption. The second approach was proposed in Euro crypt 2010 by Fehr et al., who proved that sender equivocability under chosen-cipher text attacks (NC-CCA security) implies SO-CCA security. They also proposed a new primitive called "cross-authentication code", and used it to construct a public-key encryption (PKE) scheme (the FHKW scheme) achieving NC-CCA security. However, recently in PKC 2013, Huang et al. pointed out that the properties of cross-authentication code cannot guarantee the NC-CCA security of the FHKW scheme, i.e., the security proof of the FHKW scheme is flawed. In this paper, we propose the notion of "strong cross-authentication code", which helps to fix the security proof of the FHKW scheme. This strong notion captures the ability of a cross-authentication code to efficiently generate a new key, based on all the other keys and the cross-authentication tag, such that the new key is statistically indistinguishable from the original key. With this code as a building block, we construct a new version of the FHKW scheme, and prove it to be NC-CCA secure for multi-bit plaintexts. Our work makes possible the instantiation of simulation-based SO-CCA secure PKE with a multi-bit message space from NC-CCA secure PKEs. © 2013 IEEE.

关键词： Authentication

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Data recovery of user-defined procedures in binary translation

Data recovery of user-defined procedures in binary translati...

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International Conference on BioMedical engineering and Informatics (BMEI)

作者： Xiaonan Liu Rongcai Zhao Jianmin Pang Meijuan Yin Zhenfang Wei State Key Laboratory or Mathematics Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781479927623

A binary program is a set of binary data and operations on the data. In binary translation, operations on the source machine will be transplanted to the target machine. Also, the data which the operations depend on should be migrated to the target machine, so as to ensure the complete consistency of the data accessed by the transplanted target codes and the data accessed by the source codes. Firstly, the method is presented in this paper to convert the access to the data on the source machine to the access to the corresponding data on the target machine for the user-defined procedure, and to ensure the correctness of the accessed data on the target machine in the meanwhile. Then, for the binary translation from x64 architecture to RISC architecture, the data recovery method based on semantic mapping and balanced stack frame is proposed. Also, problems in data recovery for the user-defined procedure are solved by the proposed method.

关键词： Registers Semantics Libraries Reduced instruction set computing Computer architecture Layout Data mining

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Operand stack dependence based Java static software birthmark

Operand stack dependence based Java static software birthmar...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Yong Wang Fenlin Liu Zheng Zhao Bin Lu Xin Xie Zhengzhou Institute of Information Science and Technology Zhengzhou China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781467352512

Due to the problem of semantic lost when extracting birthmark with k-gram algorithm, the operand stack dependence based static software birthmark is proposed in this paper. Before the birthmark extraction, the stack dependence bytecode fragments are got through analysis the stack dependence relation of stack behaviors in Java program. The birthmark is comprised of the stack dependence bytecode fragments and their occurrence frequencies in program. The experimental results show that the proposed birthmark has good credibility and robustness, and the performance is improved.

关键词： Software Java Resilience Semantics Heuristic algorithms Resistance Vectors

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The Research on Cryptographic Algorithms Recognition Technology

The Research on Cryptographic Algorithms Recognition Technol...

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International Conference on Intelligent System Design and engineering Application (ISDEA)

作者： Rui Chang Liehui Jiang Hui Shu Yaobin Xie State Key Laboratory of Mathematic Engineering and Advanced Computing Zhengzhou Henan China

At present, the research on security of computer system and searching for malicious codes pays more attention to cryptographic algorithms recognition technology. However, the existing theories or tools in the field of cryptographic algorithms recognition are not mature. In order to improve the accuracy of cryptographic algorithms recognizing, this paper discusses encryption and decryption functions characteristic information database and proposes a recognition model to recognize cryptographic algorithms from binary files. The accuracy assessment indicates the model is effective and feasible.

关键词： Algorithm design and analysis Ciphers Databases Information entropy Encryption Accuracy

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A New Algorithm to Exploit Superword Level Parallelism

A New Algorithm to Exploit Superword Level Parallelism

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IEEE International Symposium on Dependable, Autonomic and Secure computing (DASC)

作者： Peng Liu Rong-cai Zhao Wei Gao Shuai Wei State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China National Digital Switching System Engineering & Technology Research Center Zhengzhou China

Nowadays SIMD extensions became ubiquitous for computational platform, being widely used in signal processing, multimedia, and scientific applications. However, compilers still have difficult in vectorizing some applications, such as computations on non-contiguous and especially interleaved data, and loop nest for which inner loops that carry all the dependencies and external loops with strided memory accesses. In order to solve these problems, we adopt Isomorphic statements Grouping (ISG) after extending group following UD and DU chains, which group isomorphic computation statements that perform the same operation. And correspondingly, we generate vector permutation instructions according to the target ISA SIMD instructions at the SIMD code generation phase. This approach has been implemented in a compiler based on Open64 which translate C source program to C source program with SIMD intrinsic functions. Experiments with this compiler show that ISG Super Level Parallelism(ISG-SLP) can be used to compile a number of real-world kernels, achieving up to 3.11 speedup.

关键词： Vectors Arrays Finite impulse response filters Program processors Indexes Algorithm design and analysis Image processing

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G Bytes Data Hiding Method Based on Cluster Chain Structure

G Bytes Data Hiding Method Based on Cluster Chain Structure

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第七届中国可信计算与信息安全学术会议

作者： NIU Xiaopeng LI Qingbao WANG Wei WANG Yulong State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450002HenanChina PLA Information Engineering University Zhengzhou 450001HenanChina

Protecting the security of sensitive information has become a matter of great concern to *** hiding tech nique solves the problem to some extent, but still, some short comings remain for *** improve the capability of hid ing huge data file in disk with high *** this paper, we propose a novel approach called CryptFS, which is achieved by utilizing the file access mechanism and modifying the cluster chain structure to hide *** can quickly hide data file with G bytes size in less than *** time used for hiding and recovering data is irrelevant to the size of data file, and the reli ability of the hidden file is high, which will not be overlaid by new created file and disk defragment.

关键词： data hiding file system cluster chain index entry efficiency robustness

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Creating cluster states in flux qubits with XY-type exchange interactions

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Physical Review A 2013年第4期88卷 044303-044303页

作者： Zu-Rong Zhang Chun-Yan Li Chun-Wang Wu Hong-Yi Dai Cheng-Zu Li College of Science National University of Defense Technology Changsha 410073 People's Republic of China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450000 People's Republic of China

We propose a theoretical scheme to generate flux-qubit clusters using XY interactions. In our scheme, two neighboring qubits are coupled via a dc superconducting quantum interference device (SQUID). All flux qubits are always biased at their optimal points. The XY interaction can be controlled by the bias current applied to the SQUID for the two coupled qubits with the same resonance frequencies or by the frequency of a microwave pulse applied to the SQUID for the two coupled qubits with unequal resonance frequencies. The generation of a d-dimensional cluster state needs only 2d steps. Existing technology allows us to rapidly modulate the bias current and easily control the frequency of the pulse, and thus our scheme is experimentally feasible.

关键词： SQUIDs

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Practical decoy-state measurement-device-independent quantum key distribution

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Physical Review A 2013年第5期87卷 052329-052329页

作者： Shi-Hai Sun Ming Gao Chun-Yan Li Lin-Mei Liang Department of Physics National University of Defense Technology Changsha 410073 People's Republic of China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou 450002 People's Republic of China State Key Laboratory of High Performance Computing National University of Defense Technology Changsha 410073 People's Republic of China

Measurement-device-independent quantum key distribution (MDI-QKD) is immune to all the detection attacks; thus when it is combined with the decoy-state method, the final key is unconditionally secure, even if a practical weak coherent source is used by Alice and Bob. However, until now, the analysis of decoy-state MDI-QKD with a weak coherent source is incomplete. In this paper, we derive, with only vacuum+weak decoy state, some tight formulas to estimate the lower bound of yield and the upper bound of error rate for the fraction of signals in which both Alice and Bob send a single-photon pulse to the untrusted third party Charlie. The numerical simulations show that our method with only vacuum+weak decoy state can asymptotically approach the theoretical limit of the infinite number of decoy states. Furthermore, the statistical fluctuation due to the finite length of date is also considered based on the standard statistical analysis.

关键词： Quantum cryptography

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