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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： Xiaoyuan Yang Xiang Wu Minqing Zhang Key Laboratory of Network & Information Security of APF Engineering College of APF Xi'anChian

ISBN: (纸本)9780769537443

An audio digital signature algorithm based on Principal Component Analysis (PCA) was presented. Wavelet packet decomposition was implemented to audio files, all the terminal coefficients of the wavelet packet decomposing tree were used as the data matrix. The matrix was chaotically encrypted, and then it was Principal Component Analysis that to get the eigenvector. Quantized eigenvector matrix was used as the signature, and the signature was embedded into the primal audio data by using watermarking system, and at the same time ICA technology was introduced to locate the audio tamper. The experiment results confirm that the signature is sensitive to the change of the audio data and can locate the tamper.

关键词： multimedia digital signature tamper detection PCA ICA

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Hyper-elliptic Curves Based Ring Signature

Hyper-elliptic Curves Based Ring Signature

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International Symposium on Intelligent information Technology Application, IITA

作者： Xuanwu Zhou Key Laboratory of Network & Information Security of the APF Engineering College APF Xi'an China

Ring signature has prominent superiorities in group managing and system efficiency compared with other group cryptosystem, such as group signature. Combining HCC (Hyper-elliptic Curves Cryptosystem) and ring signature, we presented an improved ring signature scheme. The scheme avoids the operation of adding or deleting group members when the signer group has to be changed, and thus further simplify the protocol in signer group managing. The one-way trapdoor function of the scheme is based on HCDLP (Hyper-elliptic Curve Discrete Logarithm Problem), and the algorithms take great advantage of the superiority of HCC, such as high efficiency, short key length and etc. The proposed ring signature scheme can achieve the same security with less storing space, smaller communication band-width and less overheads of the system and thus proves to be applicable to such circumstances as with restricted computation ability and integrated space, circumstances with limited bandwidth yet requiring for high-speed operation.

关键词： Elliptic curve cryptography security Hardware Application software Protocols Elliptic curves Galois fields Intelligent networks information technology Laboratories

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Bionic Evolution Based Electronic Cash Scheme

Bionic Evolution Based Electronic Cash Scheme

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International Symposium on Intelligent information Technology Application, IITA

作者： Xuanwu Zhou Key Laboratory of Network & Information Security of the APF Engineering College APF Xi'an China

Combining bionic evolution and e-cash (electronic cash), we present an improved e-cash scheme based on bionic evolution algorithm. In the scheme, the private key for e-cash generating and identity tracing is generated with evolutionary algorithm by a successive optimizing process. The adaptive optimizing of secret parameters with bionic evolution avoids the randomness and indefinite security problem in private key selection, and thus prevents generalized e-cash forgery and coalition attack by dishonest users and other outer adversaries. The optimizing algorithm can also be applied to other essential parameters, such as the private keys of TTP (Trustable Third Party) and e-cash users to further improve the security of e-cash. Besides, the optimizing algorithm can be executed in advance without any influence to the efficiency of e-cash scheme. This designing strategy not only reinforces the security and stability of e-cash scheme but also greatly improves the efficiency of software and hardware application.

关键词： Evolution (biology) security Evolutionary computation Elliptic curve cryptography Forgery Stability Business Artificial intelligence Genetic programming Intelligent systems

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Extracting real-life log with data perspective in PLM system for business process analysis

Extracting real-life log with data perspective in PLM system...

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2009 WRI World Congress on computer Science and information engineering, CSIE 2009

作者： Wang, Zhaoxia Wang, Jianmin Wen, Lijie Liu, Yingbo Department of Computer Science Tsinghua University Beijing China School of Software Tsinghua University Beijing China Key Laboratory for Information System Security Ministry of Education Logistical Engineering University Chongqing China Department of Logistical Information Engineering Logistical Engineering University Chongqing China

ISBN: (纸本)9780769535074

Event log is the important starting point of any process analysis technique. Existent business process analysis techniques are applied mainly to manual or simulated logs, considering mainly information about control perspective. In this paper, we first analyze the feature of data perspective of PLM (Product Lifecycle Management) system in manufacturing area, and extend the MXML format to support the log with data perspective information in PLM domain. Subsequently, we introduce an approach of data cleaning to separate the multi-version process information in real-life data set. In the end, we produce real-life log with information about data perspective in PLM system, then, mine the process model from real-life log and evaluate the proposed approach by fitness measuring. © 2008 IEEE.

关键词： Life cycle

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Fast public-key encryption scheme based on Chinese remainder theorem

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中国高等学校学术文摘·电气与电子工程 2009年第2期4卷 181-185页

作者： Baocang WANG Yongzhuang WEI Yupu HU Key Laboratory of Computer Networks and Information Security Ministry of Education Xidian University Xi'an 710071 China School of Information and Communication Guilin University of Electronic Technology Guilin 541004 China School of Telecommunication Engineering Xidian University Xi'an 710071 China

Traditional public-key cryptosystems suffer from a relatively low encryption/decryption speed, which hampers their applications in resource-constrained environments. A fast public-key cryptosystem is proposed to remedy this drawback. The new algorithm uses Chinese remainder theorem to hide the trapdoor information. The encryption of the system only carries out several modular multiplication operations, and the decryption only needs a modular multiplication and a low-dimensional matrixvector multiplication, which makes the speed of the encryption and the decryption of the scheme very *** security of the system is based on two difficult number-theoretic problems. The attacker has to solve the integer factorization problem and the simultaneous Diophantine approximation problem simultaneously to recover the secret key from the public key. The proposed cryptosystem is also shown to be secure against lattice attack. The analysis shows that the encryption algorithm is a secure, fast and efficient public-key cryptosystem.

关键词： public-key cryptography fast public-key cipher Chinese remainder theorem integer factorization simultaneous Diophantine approximation

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Universal Image Steganalysis Based on Wavelet Packet Decomposition and Empirical Transition Matrix in Wavelet Domain

Universal Image Steganalysis Based on Wavelet Packet Decompo...

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2009 International Forum on computer Science-Technology and Applications(2009年国际计算机科学技术与应用论坛 IFCSTA 2009)

作者： Xiaoyuan Yang Yu Lei Xiaozhong Pan Jia Liu Network and Information Security Key Laboratory Electronics Department of Engineering College of the APF Xi'an China

In the paper, a new universal image steganalysis system based on wavelet packet decomposition (WPD) and empirical transition matrix in wavelet domain is proposed. First, it decomposes the test image using two-level Haar WPD. The statistical analysis is made both for the test image and their wavelet packet subbands. Second, it exploits the interscale and intrascale dependencies between wavelet coefficients. Markov empirical transition matrices are used to capture these dependencies. Fisher linear discriminator (FLD) is applied as classifier to distinguish between cover images and stego images. The experimental results have demonstrated that the proposed scheme has outperformed the existing steganalyzers in attacking a wide range of steganographic schemes include SSIS (Spread spectrum image steganography), Hide4PGP, Jsteg, F5, OutGuess.

关键词： steganalysis wavelet packet decomposition empirical transition matrix fisher linear discriminator

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Proxy re-encryption scheme based on BB2 identity based encryption

Proxy re-encryption scheme based on BB2 identity based encry...

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International Conference on computer Science and information Technology (CSIT)

作者： Xiaoyuan Yang Xu an Wang Key Laboratory of Information and Network Security Engineering College of Chinese Armed Police Force China

In 1998, Blaze, Bleumer, and Strauss proposed a kind of cryptographic primitive called proxy re-encryption. In proxy re-encryption, a proxy can transform a ciphertext computed under Alice's public key into one that can be opened under Bob's decryption key. They predicated that proxy re-encryption and re-signature will play an important role in our life. In 2007, Matsuo proposed the concept of four types of re-encryption schemes: CBE to IBE(type 1), IBE to IBE(type 2), IBE to CBE (type 3), CBE to CBE (type 4 ). Now CBE to IBE and IBE to IBE proxy re-encryption schemes are being standardized by IEEEP1363.3 working group. One feature of proxy re-encryption schemes proposed by Matsuo is that they are all based on BB1 identity based *** ask question like this: can we construct proxy re-encryption schemes based on BB2 identity based encryption? We give affirmative answer to this question. We construct an IBE to IBE proxy re-encryption scheme based on BB2 with the help of PKG and prove its security in the standard model.

关键词： Identity-based encryption Laboratories information security Educational institutions Public key cryptography Public key Secure storage Standards Working Groups

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Proxy Re-encryption Scheme Based on SK Identity Based Encryption

Proxy Re-encryption Scheme Based on SK Identity Based Encryp...

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International Symposium on information Assurance and security (IAS)

作者： Xu An Wang Xiaoyuan Yang Engineering College of Chinese Armed Police Force Key Laboratory of Information and Network Security China

ISBN: (纸本)9781424451012

The concept of proxy re-cryptography comes from the work of Blaze, Bleumer, and Strauss in 1998. The goal of proxy re-encryption is to securely enable the re-encryption of ciphertexts from one key to another, without relying on trusted parties. In 2007, Matsuo proposed the concept of four types of proxy re-encryption schemes: CBE to CBE, IBE to CBE, CBE to IBE and IBE to IBE. Now CBE to IBE and IBE to IBE proxy re-encryption schemes are being standardized by IEEEP1363.3 working group. One feature of their schemes is that they are all based on BB1 identity based encryption. We reconsider the problem of constructing proxy re-encryption based on SK identity based encryption. Surprisingly, if we consider the help of PKG, then it is easy to construct proxy re-encryption based on SK identity based encryption. Interestingly , our proxy re-encryption scheme even can achieve CCA2 secure, which makes it is unique.

关键词： Identity-based encryption Hydrogen information security Cryptography Laboratories Educational institutions Large-scale systems Government

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Improved EMD steganography with great embedding rate and high embedding efficiency

Improved EMD steganography with great embedding rate and hig...

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IIH-MSP 2009 - 2009 5th International Conference on Intelligent information Hiding and Multimedia Signal Processing

作者： Qu, Zhiguo Fu, Yu Niu, Xinxin Yang, Yixian Zhang, Ru Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9780769537627

EMD steganographic method by exploiting modification direction in the host images to send secret messages was proposed by Zhang et al. Comparing with other steganographic algorithms, its highlight is high embedding efficiency. In this paper, we describe a new novel method of steganography based on bese idea of EMD embedding, which builds up the multilevel for the secret messages and decreases the redundancy of the host image's transparency for better embedding rate. In order to obtain better transparency of images and conveniency of algorithm, embedding modification does not happen on LSB of the pixels but frequency coefficients in new improved EMD method. The results of experiments show that the proposed method has better performances on the embedding efficiency and the embedding rate than the EMD steganography. © 2009 IEEE.

关键词： Steganography

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A model for real-time simulation of large-scale networks based on network processor

A model for real-time simulation of large-scale networks bas...

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2009 2nd IEEE International Conference on Broadband network and Multimedia Technology, IEEE IC-BNMT2009

作者： Xiaobo, Xu Kangfeng, Zheng Yixian, Yang Guoai, Xu Key Laboratory of Network and Information Attack and Defense Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781424450053

Real-time network simulation refers to simulating computer networks in real time so that the virtual network can interact with real implementations of network protocols, network services, and distributed applications. This paper proposes a new model for real-time simulation of large-scale networks based on powerful network processor. The scheme takes advantage of discrete event system simulation model to simulating large-scale network. This paper describes the implementation of network simulation technology based on Intel IXP2400 platform. Experiment results show that the model can simulate large-scale network, learn routing entries automatically and forward packets at wire-speed. ©2009 IEEE.

关键词： network protocols

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