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DMAT: A new network and computer attack classification

Journal of Engineering Science and technology Review 2013年第5期6卷 101-106页

作者： Jiang, Wei Tian, Zhi-Hong Cui, Xiang College of Computer Science Beijing University of Technology Beijing 100124 China School of Computer National University of Defense Technology Changsha 410073 China Key Laboratory of Information and Network Security Ministry of Public Security Shanghai 201204 China School of Computer Science and Technology Harbin Institute of Technology Haerbin 150001 China The Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

With the rapid development of computer network and information technology, the Internet has been suffering from a variety of security attacks over the past few years. Attacks have become both numerous and complex, and the defender can not understand. In order to understand and defend against cyber attacks, it is necessary to understand the kind of attack. In this paper, we study computer and network attacks, and introduce a classification of them and propose a cyber attack classification called DMAT (Defense-oriented Multidimensional Attack Taxonomy). We use nine categories to describe the characteristic of the attack, which are attack target, attack impact, attack purpose, attack cost, attack exploiting, attack source, attack automation, attack loss and defense. The ninth category in the DMAT, classification by defense, is used to provide the defender with instructions of how to defense an attack. Compared to the existing taxonomies, our taxonomy efficiently classifies complex attacks and guide the defender to defense the possible attack. © 2013 Kavala Institute of technology. All rights reserved.

关键词： network security

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Changes of net primary productivity in China during recent 11 years detected using an ecological model driven by MODIS data

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Frontiers of Earth Science 2013年第1期7卷 112-127页

作者： Yibo LIU Weimin JU Honglin HE Shaoqiang WANG Rui SUN Yuandong ZHANG Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Nanjing University Nanjing 210093 China International Institute for Earth System Science Nanjing University Nanjing 210093 China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China State Key Laboratory of Remote Sensing Science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing Applications of Chinese Academy of Sciences Beijing 100875 China Key Laboratory of Forest Ecology and Environment State Forestry Administration Institute of Forest Ecology Environment and Protection Chinese Academy of Forestry Beijing 100091 China

Net primary productivity （NPP） is an important component of the terrestrial carbon cycle. Accurately mapping the spatial-temporal variations of NPP in China is crucial for global carbon cycling study. In this study the process-based Boreal Ecosystem Productivity Simulator （BEPS） was employed to study the changes of NPP in China＇s ecosystems for the period from 2000 to 2010. The BEPS model was first validated using gross primary productivity （GPP） measured at typical flux sites and forest NPP measured at different regions. Then it was driven with leaf area index （LAI） inversed from the Moderate Resolution Imaging Spectroradiometer （MODIS） reflec- tance and land cover products and meteorological data interpolated from observations at753 national basic meteorological stations to simulate NPP at daily time steps and a spatial resolution of 500m from January 1, 2000 to December 31, 2010. Validations show that BEPS is able to capture the seasonal variations of tower-based GPP and the spatial variability of forest NPP in different regions of China. Estimated national total of annual NPP varied from 2.63 to 2.84Pg ***-1, averaging 2.74Pg ***-1 during the study period. Simulated terrestrial NPP shows spatial patterns decreasing from the east to the west and from the south to the north, in association with land cover types and climate. South-west China makes the largest contribution to the national total of NPP while NPP in the North-west account for only 3.97% of the national total. During the recent 11 years, the temporal changes of NPP were heterogamous. NPP increased in 63.8% of China＇s landmass, mainly in areas north of the Yangtze River and decreased in most areas of southern China, owing to the low temperature freezing in early 2008 and the severe drought in late 2009.

关键词： temporal and spatial variations NPP remotesensing MODIS data BEPS model

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Cryptanalysis of 2-layer nonlinear piece in hand method

Cryptanalysis of 2-layer nonlinear piece in hand method

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CD-ARES 2013 Workshops: 2nd International Workshop on Modern Cryptography and security Engineering, MoCrySEn 2013 and 3rd International Workshop on security and Cognitive Informatics for Homeland Defense, SeCIHD 2013

作者： Nie, Xuyun Petzoldt, Albrecht Buchmann, Johannes School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Technische Universität Darmstadt Department of Computer Science Hochschulstraße 10 64289 Darmstadt Germany State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China Network and Data Security Key Laboratory of Sichuan Province China

ISBN: (纸本)9783642405877

Piece in Hand method is a security enhancement method for Multivariate Public key Cryptosystems (MPKCs). Since 2004, many types of this method have been proposed. In this paper, we consider the 2-layer nonlinear Piece in Hand method as proposed by Tsuji et al. in 2009. The key point of this method is to introduce an invertible quadratic polynomial map on the plaintext variables to construct perturbation of the original MPKC. Through our analysis, we find that the security of the enhanced scheme is mainly relying on the quadratic polynomials of this auxiliary map. The two examples proposed by Tsuji et al. for this map can not resist the Linearization Equation attack. Given a valid ciphertext, we can easily get a public key which is equivalent to the original MPKC. If there is an algorithm that can recover the plaintext corresponding to a valid ciphertext of the original MPKC, we can construct an algorithm that can recover the plaintext corresponding to a valid ciphertext of the enhanced MPKC. © IFIP International Federation for Information Processing 2013.

关键词： Linearization

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LSB replacement steganography software detection based on model checking

LSB replacement steganography software detection based on mo...

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11th International Workshop on Digital Forensics and Watermaking, IWDW 2012

作者： Zhao, Zheng Liu, Fenlin Luo, Xiangyang Xie, Xin Yu, Lu Department of Network Engeering Zhengzhou Information Science and Technology Institute Zhengzhou 450002 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Science Beijing 100093 China Department One Academy of National Defense Information 430000 Wuhan China

ISBN: (纸本)9783642400988

Steganography software detection is one of effective approaches for steganography forensics using software analysis. In this paper a method of LSB replacement steganography software detection is proposed. Firstly three typical implementations of LSB replacement algorithms are analyzed and Finite Automatons description of them are presented. Secondly the control flow automatons are constructed for softwares to be detected. Finally, the model checking method for identifying LSB replacement steganography software is adopted. Experimental results show that the proposed method can reliably detect LSB replacement steganography softwares of different versions and those that are reimplemented relatively. © 2013 Springer-Verlag.

关键词： Model checking

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Efficient public key cryptosystem resilient to key leakage chosen ciphertext attacks 1

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Cryptographers' Track at the RSA Conference 2013, CT-RSA 2013

作者： Liu, Shengli Weng, Jian Zhao, Yunlei Dept. of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Computer Science Emergency Technology Research Center of Risk Evaluation and Prewarning on Public Network Security Jinan University China Software School Fudan University Shanghai 201203 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China Shanghai Key Laboratory of Scalable Computing and Systems Shanghai China

ISBN: (数字)9783642360954

ISBN: (纸本)9783642360947

Leakage-resilient public key encryption (PKE) schemes are designed to resist "memory attacks", i.e., the adversary recovers the cryptographic key in the memory adaptively, but subject to constraint that the total amount of leaked information about the key is bounded by some parameter λ. Among all the IND-CCA2 leakage-resilient PKE proposals, the leakage-resilient version of the Cramer-Shoup cryptosystem (CS-PKE), referred to as the KL-CS-PKE scheme proposed by Naor and Segev in Crypto09, is the most practical one. But, the key leakage parameter λ and plaintext length m of KL-CS-PKE are subject to λ + m ≤ log q - ω(log κ), where κ is security parameter and q is the prime order of the group on which the scheme is based. Such a dependence between λ and m is undesirable. For example, when λ (resp., m) approaches to log q, m (resp., λ) approaches to 0. In this paper, we designed a new variant of CS-PKE that is resilient to key leakage chosen ciphertext attacks. Our proposal is λ ≤ log q - ω(log κ) leakage-resilient, and the leakage parameter λ is independent of the plaintext space that has the constant size q (exactly the same as that in CS-PKE). The performance of our proposal is almost as efficient as the original CS-PKE. As far as we know, this is the first leakage-resilient CS-type cryptosystem whose plaintext length is independent of the key leakage parameter, and is also the most efficient IND-CCA2 PKE scheme resilient to up to log q - ω(log κ) leakage. © 2013 Springer-Verlag.

关键词： Public key cryptography

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Improvement on Ahn et al.'s RSA P-homomorphic signature scheme

Improvement on Ahn et al.'s RSA P-homomorphic signature sche...

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8th International ICST Conference on security and Privacy in Communication networks, SecureComm 2012

作者： Wang, Zhiwei College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100190 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China

ISBN: (纸本)9783642368820

P-homomorphic signature is a general framework for computing on authenticated data, which is recently proposed by Ahn et al. With P-homomorphic signature, any third party can derive a signature on the object message m′ from a signature of m, if m′ and m satisfy P(m,m′) = 1 for some predicate P which denotes the authenticatable relationship between m′ and m. Ahn et al. proposed a RSA P-homomorphic signature scheme by using a RSA accumulator, which is very efficient in space. However, the computational cost of verification and derivation is very heavy. We present an improved P-homomorphic signature scheme based on factoring problem. In our construction, the time efficiency of both verification and derivation are much better than Ahn's scheme. © 2013 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering.

关键词： Authentication

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An in-depth measurement and analysis of popular private tracker systems in China

An in-depth measurement and analysis of popular private trac...

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IEEE International Conference on Communications (ICC)

作者： Qiang Li Tao Qin Xiaohong Guan Qinghua Zheng Qiuzhen Huang Department of Automation Tsinghua National Laboratory for Information Science and Technology Beijing China Ministry of Education Key Laboratory for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an China

In recent years, a novel BitTorrent (BT) technology, Private Tracker (PT), has received extensive attentions in academia. Due to its huge amount of traffic volumes and population, it is essential to understand the characteristics for system management. In this paper, by using the data crawled from a number of well-known PT sites in China, we present an in-depth measurement and analysis on the PT system, in terms of resources characteristics and user behavior characteristics. Our analysis on the activity and age distribution of torrents reveals that the sequence of torrent activities follows a power-law distribution and the sequence of torrent ages follows a linear distribution. By investigating the characteristics of the core users and the resources in different PT sites, two observations have been made. Firstly, every PT site has a number of users with stable levels who contribute to the survivability and popularity of the site. Secondly, a large amount of redundancy exists among the distributed resources and many popular resources are duplicated among these sites, which leads to the quick spread of pirate resources. Based on the measurement results, we analyze the drawbacks of PT mechanisms and propose useful suggestions to promote the healthy development and performance of PT.

关键词： Redundancy Communities Educational institutions Peer-to-peer computing Time measurement Videos Motion pictures

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Shaking table model test on failure of tunnel portal section under strong earthquake

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Rock Characterisation,Modelling and Engineering Design Methods——The 3rd ISRM SINOROCK Symposium

作者： X.Zhao T.B.Li L.J.Tao S.Hou Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyPingleyuanChaoyang District State Key laboratory of Geohazard Prevention and Geoenvironment Protection Chenghua District Institute for Geotechnical Engineering and Underground Construction Beijing University of TechnologyPingleyuanChaoyang District

ISBN: (纸本)9781138000575

Mountainous tunnel portal section is one of the most easily damaged parts during strong earthquake. Failures of this part may block roads,which greatly influences the transportation of the local area after *** tests on shaking table of tunnel portal section are carried out.A rigid testing box is adopted in the *** rock condition around tunnel portal section is designed rather weak as the rock in this part is often weathered and loose.A new similarity material with a main component of fly ash has been successfully made to simulate the surrounding *** with a model scale of 1:50 are *** angles are set to 35°according to the slope range limited by the rock *** the testing results,the rule of tunnel portal failure under the condition is *** results can be references for other similar projects and for seismic damping measure design.

关键词： Shaking table model test on failure of tunnel portal section under strong earthquake portal

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Performance Comparison on network-Wide Time Synchronization Approaches in Wireless Sensor networks

Performance Comparison on Network-Wide Time Synchronization ...

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2013 IEEE International Conference on Microwave technology & Computational Electromagnetics

作者： Rong Fan Wenlong Xu LiLi Wu Li Han School of Information and Electronics Beijing Institute of Technology Shaanxi Key Laboratory of Network and System Security Xidian university

ISBN: (纸本)9781467363266

Wireless sensor networks(WSNs) have received a lot of attention recently due to their enormous potential in different *** in all distributed systems,time synchronization is very important in a sensor network since the design of many protocols and implementation of applications require precise *** this article,we first gave some basic background knowledge about time *** we introduced several typical network-wide time synchronization *** last,we compared their performances according to the some previous simulation results.

关键词： network-wide synchronization protocols,Performance comparison,Time synchronization,WSNs.

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Mining protocol state machines by interactive grammar inference

Mining protocol state machines by interactive grammar infere...

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2012 3rd International Conference on Digital Manufacturing and Automation, ICDMA 2012

作者： Zhang, Zhao Wen, Qiao-Yan Tang, Wen State Key Laboratory of Network and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China IT Security Cooperate Technology Siemens Ltd. Beijing 100102 China

ISBN: (纸本)9780769547725

Protocol state machine is very essential in network security and implementation fields, however, improper management of software evolution, compounded by changing and imprecise requirements, along with "short time to market" phenomenon, often leads to a lack of up-to-date specifications and they are often characterized by bugs, anomalies and even threads. How to mine the accurate protocol state machine under investigation is still an open problem. We address this problem by using an interactive grammar inference technique as it could generate queries to the protocol implementation in learning process. This paper describes: (1) a flexible method to construct and parse real packet according to the packet format, (2) how to generate packet queries to explore protocol state machine space, (3) applies the QSM technology to mine protocol state machine from network traces. To access the usefulness of our approach, several experiments for different protocols are performed and we could get more objective and accurate results compared with other protocol specification mining methods. © 2012 IEEE.

关键词： network security

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