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2013 International Conference on advanced Computer Science and Electronics Information(ICACSEI 2013)

作者： Hongwei Tao State Key Laboratory of Mathematical Engineering and Advanced Computing ZhengzhouChina China National Digital Switching System Engineering and Technological Research Center

TTM cryptosystems proposed by *** are very fast due to the properties of tame automorphisms and small finite fields. The success of the first implementation of this system relies on the construction of Q 8 -module. Unfortunately, Jintai Ding and Timonthy Hodges have defeated it by decomposing function Q 8 into terms S, T 1 , T 2 . Later Chunyen Chou, D. J. Guan and Jiunming Chen gave a systematic way to construct Q 2 k -module. In this paper, we describe an implementation of TTM cryptosystems based on this Q 2 k -module, then with method similar to Ding-Hodges, we break this implementation. For any given ciphertext, we can derive the corresponding plaintext within O((n+r) 6 ) F 2 m -operations, where n+r is the number of ciphertext variables.

关键词： Multivariate public key cryptosystems, TTM, high order linearization equations

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Dynamic evolution of collective emotions in social networks: a case study of Sina weibo

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Science China(Information Sciences) 2013年第7期56卷 150-167页

作者： XIONG XiaoBing ZHOU Gang HUANG YongZhong CHEN HaiYong XU Ke State Key Laboratory of Mathematical Engineering and Advanced Computing State Key Laboratory of Software Development Environment Beihang University

Emotion is a fundamental object of human existence and determined by a complex set of factors. With the rapid development of online social networks (OSNs), more and more people would like to express their emotion in OSNs, which provides wonderful opportunities to gain insight into how and why individual emotion is evolved in social network. In this paper, we focus on emotion dynamics in OSNs, and try to recognize the evolving process of collective emotions. As a basis of this research, we first construct a corpus and build an emotion classifier based on Bayes theory, and some effective strategies (entropy and salience) are introduced to improve the performance of our classifier, with which we can classify any Chinese tweet into a particular emotion with an accuracy as high as 82%. By analyzing the collective emotions in our sample networks in detail, we get some interesting findings, including a phenomenon of emotion synchronization between friends in OSNs, which offers good evidence for that human emotion can be spread from one person to another. Furthermore, we find that the number of friends has strong correlation with individual emotion. Based on those useful findings, we present a dynamic evolution model of collective emotions, in which both self-evolving process and mutual-evolving process are considered. To this end, extensive simulations on both real and artificial networks have been done to estimate the parameters of our emotion dynamic model, and we find that mutual-evolution plays a more important role than self-evolution in the distribution of collective emotions. As an application of our emotion dynamic model, we design an efficient strategy to control the collective emotions of the whole network by selecting seed users according to k-core rather than degree.

关键词： online social network emotion classifier emotion spread emotion dynamic model emotion controlling

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Program Crash Analysis Based on Taint Analysis

Program Crash Analysis Based on Taint Analysis

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International Conference on P2P, Parallel, Grid, Cloud and Internet computing (3PGCIC)

作者： Zhang Puhan Wu Jianxiong Wang Xin Zehui Wu China Information Technology Security Evaluation Center Beijing China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781479978724

Software exception analysis can not only improve software stability before putting into commercial, but also could optimize the priority of patch updates subsequently. We propose a more practical software exception analysis approach based on taint analysis, from the view that whether an exception of the software can be exploited by an attacker. It first identifies the type of exceptions, then do taint analysis on the trace that between the program entry point to exception point, and recording taint information of memory set and registers. It finally gives the result by integrating the above recording and the subsequent instructions analysis. We implement this approach to our exception analysis framework ExpTracer, and do the evaluation with some exploitable/un-exploitable exceptions which shows that our approach is more accurate in identifying exceptions compared with current tools.

关键词： Computer crashes Registers Software Optimization Algorithm design and analysis Instruments Personnel

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Improving guide-based vulnerability detection with hybrid symbolic execution

Improving guide-based vulnerability detection with hybrid sy...

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International Conference on Systems and Informatics (ICSAI)

作者： Yongji Ouyang Shuai Zeng Chao Yang Qingxian Wang State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China State Key Laboratory of Management and Control for Complex System Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781479954599

Symbolic Execution is a key and useful technology in current refinement software test, but there still exists some problems such as space explosion. In order to mitigate this problem and improve the ability for detecting vulnerabilities, this paper presents the improving guide-based vulnerability detection with hybrid symbolic execution, which aims to test suspicious objects. This method conducts path traversal with a hybrid symbolic execution model, which alternates between dynamic and static symbolic execution, and verify whether it is vulnerability through summarizing the characteristics of vulnerabilities and generating a constraint expression. Experimental result shows that this method can successfully detect errors in 56 seconds, which exceeds any other modern mainstream symbolic execution tools including CUTE, KLEE, S2E and Cloud9. Compared with CUTE, this method alleviates the problem of space explosion. Besides, this papaer successfully verifies the vulnerabilities of OpenSSL and some other commonly used software.

关键词： Testing Algorithm design and analysis Software Explosions Refining Context Hybrid power systems

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Chip waveforms attribute recognition model research and design

Chip waveforms attribute recognition model research and desi...

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2014 International Conference on Manufacturing Technology and Electronics Applications, ICMTEA 2014

作者： Xiao, Da Feng, Jing Zhu, Yue Fei Peng, Fei Lan, Jing Hong Computer network department ZhengZhou Information Science University ZhengZhouHeNan China State Key Laboratory of Mathematical Engineering and Advanced Computing ZhengZhouHeNan China Urumqi General Hospital of PLA.Urumqi 7 Jianxue Street Xinjiang Uygur Zizhiqu Jinshui District ZhengZhouHeNan China

ISBN: (纸本)9783038353287

For hardware Trojan detection process is difficult to effectively extract the exact equivalent logic function of the target chip logic function is proposed based on contradictory truth table equivalent extraction scheme and key Enabling technologies. Designed to target chip waveforms attribute recognition model, through the analysis of multiple properties of the model and proof, the work is given waveform attribute recognition model parameter setting principles. © (2014) Trans Tech Publications, Switzerland.

关键词： Malware

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Adaptability of BFS algorithm and multicore processor

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Dongbei Daxue Xuebao/Journal of Northeastern University 2014年 35卷 96-101页

作者： Ye, Nan Hao, Zi-Yu Zheng, Fang Xie, Xiang-Hui State Key Laboratory of Mathematical Engineering and Advanced Computing Wuxi214083 China

The typical features of graph algorithm represented by breadth-first search (BFS) were investigated, and a lightweight heuristic switch strategy was designed and implemented by automatically switching through two basic search methods to improve search efficiency. Based on discrete and random data access characteristics of BFS algorithm and execution mechanism of multicore processor, an analytic model of multicore processor architecture was established to guide the research about the operating characteristics and performance trends on the typical multicore processors. The results showed that the lowest Cache hit ratio is about 85%, pipeline stall ratio is more than 50%, branch misprediction ratio reaches up to 14%, and pipeline total utilization efficiency is only 35%. So the current multicore processor can't support graph computing efficiently. ©, 2014, Northeastern University. All right reserved.

关键词： Pipelines

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G Bytes Data Hiding Method Based on Cluster Chain Structure

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Wuhan University Journal of Natural Sciences 2013年第5期18卷 443-448页

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

Protecting the security of sensitive information has become a matter of great concern to everyone. Data hiding technique solves the problem to some extent, but still, some shortcomings remain for researching. To improve the capability of hiding huge data file in disk with high efficiency. In 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 data. CryptFS can quickly hide data file with G bytes size in less than 0.1s. The time used for hiding and recovering data is irrelevant to the size of data file, and the reliability 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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One wide-sense circuit tree per traffic class based inter-domain multicast

One wide-sense circuit tree per traffic class based inter-do...

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2013 IEEE 8th International Conference on Networking, Architecture and Storage, NAS 2013

作者： Yue, Chen Chaoling, Li Kaixiang, Huang Xiaobo, Zhang State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9780769550343

Traditional multicast protocol forms multicast trees rooted at different sources to forward packets. If the multicast sources and receivers are in different domains, these trees will produce a great number of multicast states in the backbone, resulting in poor scalability. Therefore, we propose a one Wide-Sense Circuit Tree per Traffic Class based inter-domain multicast (WSCT-TC), in which a Wide-Sense Circuit Tree (WSCT) is established for a class of multicast traffic. The WSCT is established in the backbone, along which multicast packets are forwarded by label switching. The spec of WSCT can be reconfigured according to the QoS (Quality of Service) requirement of multicast applications, to provide preferable QoS. Simulating experiment shows that WSCT-TC behaves better scalability. © 2013 IEEE.

关键词： Scalability

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Carrying multicast traffic across domain by per-access-network based Wide-Sense Circuit Tree

Carrying multicast traffic across domain by per-access-netwo...

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2013 IEEE International Conference of IEEE Region 10, IEEE TENCON 2013

作者： Yue, Chen Chaoling, Li Kaixiang, Huang Xiaobo, Zhang State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781479928262

IP multicast suffers from scalability and QoS provisioning problems when supporting large scale group communication cross domain. To solve the problems, we propose WSCT-PAN, a per-access-network based wide-sense circuit tree transmission scheme, in which one Wide-Sense Circuit Tree (WSCT) is established for a class of multicast traffic per access network. By using mapping and label switching, multiple multicast groups' traffic with the same traffic class from the same access network share only one dynamic reconfigurable wide-sense circuit tree in the backbone network. The WSCT branches extend only to the access networks the multicast receivers located in. So, the tradeoff between efficient multicast label switching and traffic redundancy in the backbone network is achieved. Compared with the traditional cross domain multicast, WSCT-PAN is more scalability, and suitable for large scale cross domain multicast deployment. © 2013 IEEE.

关键词： Scalability

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Efficient client-to-client password authenticated key exchange based on RSA

Efficient client-to-client password authenticated key exchan...

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

作者： Ma, Chuangui Wei, Fushan Gao, Fengxiu State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9780769549880

The design of secure password authenticated key exchange (PAKE) protocols with RSA is a nontrivial hard work. Until now there have been only a few secure PAKE protocols based on RSA and most of them work in the two-party setting. Although two-party PAKE protocols are quite useful for client-server architectures, they are very inconvenient in key management for client-client communications in large-scale communication environment. In this paper we present an efficient PAKE protocol using RSA in the three-party setting, called E3PAKE-RSA protocol. We also provide a formal security proof of E3PAKE-RSA protocol under the RSA assumption and the random oracle model. © 2013 IEEE.

关键词： Authentication

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