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An adaptively secure multi-authority ciphertext-policy ABE scheme on prime order groups

Tien Tzu Hsueh Pao/Acta Electronica Sinica 2014年第4期42卷 696-702页

作者： Li, Qi Ma, Jian-Feng Xiong, Jin-Bo Liu, Xi-Meng Ma, Jun School of Computer Science and Technology Xidian University Xi'an Shaanxi 710071 China School of Telecommunication Engineering Xidian University Xi'an Shaanxi 710071 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an Shaanxi 710071 China

Previous adaptively secure multi-authority attribute-based encryption (ABE) schemes suffered from superfluous computation overhead on composite order groups. To tackle this problem, an adaptively secure multi-authority ciphertext-policy ABE (MA-CP-ABE) scheme on prime order groups was proposed when a dual pairing vector space approach was employed. The proposed scheme supports any monotone access structure, and is proven adaptively secure from the decisional linear assumption in the standard model. Performance analysis indicates that our scheme is more efficient while achieving the adaptive security.

关键词： Vector spaces

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vPatcher: VMI-Based Transparent Data Patching to Secure Software in the Cloud

vPatcher: VMI-Based Transparent Data Patching to Secure Soft...

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IEEE International Conference on Trust, Security and Privacy in computing and Communications (TrustCom)

作者： Hao Zhang Lei Zhao Lai Xu Lina Wang Deming Wu Computer School Wuhan University Wuhan China Ministry of Education The Key Laboratory of Aerospace Information and Trusted Computing Wuhan China The State Key Laboratory for Novel Software Technology Nanjing University China The Key Laboratory of Science and Technology in information Assurance Technology

ISBN: (纸本)9781479965144

Quick defense against the spread of software exploits is an important problem, and hot patching is an attractive approach to solve this problem. However, these approaches cannot adapt to cloud well, which brings new challenges to the protection of software. Among these challenges, transparency and rapid deployment are two respective requirements for protection. In this paper, we propose vPatcher, a transparent data patching technique based on Virtual Machine Introspection. Vpatcher uses hypervisor to monitor the network connections of vulnerable programs in protected guest systems, deployed outside the Virtual Machines, without disturbing the target guest systems. Given the vulnerability signatures, vPatcher intercepts network packets, scans these packets for vulnerable processes by reconstructing fine-grained system semantics that include process states as well as corresponding network connections, detects them with their vulnerability signatures, and finally filters exploits. We adopted several realistic vulnerable programs used broadly to evaluate the effectiveness of the technique, and experimental results showed its efficacy and that the overhead is acceptable. In addition, the experiments also show that it could be transparent to guest systems, and suitable for rapid deployment in cloud platforms.

关键词： Data structures Semantics Virtual machining Inspection Ports (computers) Kernel Availability

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Waveform decreasing multi-copy based routing in low node density DTNs

Waveform decreasing multi-copy based routing in low node den...

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Joint International Conference on Pervasive computing and the Networked World, ICPCA/SWS 2012

作者： Yu, Chen Zhang, Longbo Jin, Hai Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9783642370144

Delay Tolerant Networks (DTN) is one of the mobile wireless networks that topology logic may change frequently. Variable topology logic characteristics lead to several low efficiency routing problems, and in which how to increase the routing efficiency in low node density is an important issue that must be solved. The mainstream DTN routing strategy is multi-copy based routing and in order to solve the problem of flooding scale, the routing strategy always makes the messages flooding scale change under specific conditions called Waveform Decreasing Multi-copy (WDM) routing strategy: the flooding scale could increase or decrease. In this paper, we propose an improved routing strategy named WDM routing strategy aimed to improve the routing efficiency under low node density in DTN environment. Using several special mechanisms, the improved WDM routing strategy can obtain good performance in the case of low node density: transfer new messages first, special message transfer list, and the way of flooding scale changed. The simulation results show the WDM routing significantly improve the performance than the two mainstream routing: the Spray and Wait routing and the MaxProp routing. © 2013 Springer-Verlag.

关键词： Delay tolerant networks

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Friends based keyword search over online social networks

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8th International Conference on Grid and Pervasive computing, GPC 2013

作者： Huang, Jinzhou Jin, Hai Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9783642380266

Online social networks are rapidly becoming popular for users to share, organize and locate interesting content. Users pay much attention to their close friends, those direct or two-hop friends. Users of Facebook commonly browse relevant profiles and the homepages, which are inefficient in obtaining desired information for a user due to the large amount of relevant data. In this paper, we propose a summary index with a ranking model by extending existing Bloom filter techniques, and achieve efficient full-text search over large scale OSNs to reduce inter-server communication cost and provide much shorter query latency. Furthermore, we conduct comprehensive simulations using traces from real world systems to evaluate our design. Results show that our scheme reduces the network traffic by 94.1% and reduces the query latency by 82.4% with high search accuracy. © 2013 Springer-Verlag.

关键词： Social networking (online)

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Cranduler: A dynamic and reusable scheduler for cloud infrastructure service

Cranduler: A dynamic and reusable scheduler for cloud infras...

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Joint International Conference on Pervasive computing and the Networked World, ICPCA/SWS 2012

作者： Shi, Xuanhua Xie, Bo Wu, Song Jin, Hai Zhu, Hongqing Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9783642370144

As an import trend of cyberspace in the future, cloud computing has attracted much attention from the IT industry. Many research institutions and companies have launched their own cloud platforms, which have virtual machine schedulers to manage the infrastructure resource pool. The virtual machine scheduling modules in these platforms are built in the platform and it is hard for developers to re-program. Since developers cannot design and implement special policies in the platform, the flexibility of the virtual machine scheduler is poor. Furthermore, the schedule architecture which has a firm and unchangeable interface is designed and customized for one kind of cloud platform. It leads to poor portability. To target the problems above, this paper presents a dynamic and reusable scheduling system for cloud infrastructure service, called Cranduler, which introduces the advantages of cluster schedulers to the virtual machine scheduling in cloud infrastructure. The scheduling policies of Cranduler could be dynamically configured by developers. Developers can easily insert the custom policy. In addition, Cranduler provides a set of unified interfaces to the cloud platform, which make the system easily access resources from different cloud platforms and be reused in different cloud platforms. © 2013 Springer-Verlag.

关键词： Virtual machine

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Cloud authentication based on anonymous one-time password

Cloud authentication based on anonymous one-time password

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7th International Conference on Ubiquitous Information Technologies and Applications, CUTE 2012

作者： Yassin, Ali A. Jin, Hai Ibrahim, Ayad Qiang, Weizhong Zou, Deqing Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9789400758568

Cloud computing contains many enterprise applications that require from each user to perform authenticate at first step. Then, he will gain a permit from the service provider to access resources at second step. The issue breach remains facing a modern computing model. A more secure scheme is the two-factor authentication (2FA) that requires a second factor (such as finger print, token) with username/password. Nevertheless, the feasibility of 2FA is largely limited by high device cost, malicious attack and the deployment complexity. In this paper, we propose a scheme of 2FA in cloud computing systems that depends on One-Time Password (OTP), Asymmetric Scalar-product Preserving Encryption (ASPE) and RSA digital signature as two factors. Furthermore, it overcomes aforementioned issues and does not require extra devices such as token device, card reader in smart card and scanner in physiological biometrics. The proposed scheme distinguishes to resist practical attacks, high-security level, anonymous password, mutual authentication, identity management, the cloud server and a user can establish authenticated session keys, reduces the cost, and good performance. © 2013 Springer science+Business Media.

关键词： Cloud computing

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Scalable SAPRQL querying processing on large RDF data in cloud computing environment

Scalable SAPRQL querying processing on large RDF data in clo...

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Joint International Conference on Pervasive computing and the Networked World, ICPCA/SWS 2012

作者： Wu, Buwen Jin, Hai Yuan, Pingpeng Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9783642370144

Recently the flexibility of RDF data model makes increasing number of organizations and communities keep their data available in the RDF format. There is a growing need for querying these data in scalable and efficient way. MapReduce is a parallel data processing solution for processing large data-intensive workloads, which is not supported directly for join-intensive workloads. In this paper, we present a schema based hybrid partitioning technique for RDF triples placement according to the relationships between them, and reduce the necessary number of MR cycles in each SAPRQL query job. Then we propose a lightweight sideways information passing techniques which pass the join information across MR jobs to decrease the intermediate results involved in join operations. The experimental results show that our approaches achieve a substantial performance improvement, and outperform the previous system by a factor of 2-20 using LUBM benchmark. © 2013 Springer-Verlag.

关键词： MapReduce

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An enhanced security mechanism for web service based systems

An enhanced security mechanism for web service based systems

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Joint International Conference on Pervasive computing and the Networked World, ICPCA/SWS 2012

作者： Jiang, Wenbin Dong, Hao Jin, Hai Xu, Hui Liao, Xiaofei Services Computing Technology and System Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9783642370144

Web service technologies have been widely used in diverse applications. However, there are still many security challenges in reliability, confidentiality and data nonrepudiation, which are prominent especially in some Web service systems that have massive resources in diverse forms. An enhanced mechanism for secure accesses of Web resources is presented and implemented based on the combination of modules of identity authentication, authorized access, and secure transmission to improve the security level of these systems. In the identity authentication, the highly safe and recognized authentication method U-Key is used. For the aspect of authorized access, the integration of an improved Spring Security framework and J2EE architecture is applied to ensure authorized access to Web resources, while the security interceptor of Spring Security is extended and a series of security filters are added to keep web attacks away. Moreover, some improvements of the XML encryption and XML decryption algorithm are made to enhance the security and speed of data transmission, by means of mixing RSA and DES algorithm. The above security mechanism has been applied to an online virtual experiment platform based on Web services named VeePalms. The experimental results show that most security problems with high severity in the system have been solved and medium-low severe problems degreased dramatically. © 2013 Springer-Verlag.

关键词： Web services

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Temporal Verification for Business Cloud Workflows: Open Research Issues

Temporal Verification for Business Cloud Workflows: Open Res...

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International Conference on Semantics, Knowledge and Grid (SKG)

作者： Zhou Zhao Futian Wang Xiaoliang Fan Xiao Liu Shanghai Key Laboratory of Trustworthy Computing East China Normal University China School of Computer Science and Technology Anhui University China School of Information Science & Engineering Lanzhou University China

ISBN: (纸本)9781479967162

In recent years, cloud computing is establishing itself as the latest high-performance and high-throughput computing paradigm, and thus doing business in the cloud is becoming a reality. However, due to the dynamic nature of the cloud environment, the on-time completion of time-constrained business workflows is a big challenge. Workflow temporal verification as the major approach to monitor and control the correctness of temporal consistency plays a critical role in the on-time completion of business workflow instances. In the recent decade, great efforts have been dedicated to the area of workflow temporal verification and it is high time that we should define the key research issues for business cloud workflows in order to keep our research on the right track. In this paper, we systematically investigate this problem and propose four key research issues based on the introduction of a generic temporal verification framework. Meanwhile, some preliminary solutions and open challenges are presented and discussed. Finally, Swin DeW-V, an on-going research project on temporal verification as part of our Swin DeW-C cloud workflow system, is also demonstrated.

关键词： Business Cloud computing Throughput Quality of service Monitoring Time factors Measurement

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Ventral stream plays an important role in statistical graph comprehension: An fMRI study

Ventral stream plays an important role in statistical graph ...

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2014 International Conference on Brain Informatics and Health, BIH 2014

作者： Li, Mi Lu, Shengfu Wang, Jing Ma, Liwang Zhang, Mengjie Zhong, Ning International WIC Institute Beijing University of Technology Beijing 100024 China School of Computer and Communication Engineering Liaoning ShiHua University Liaoning 113001 China Dept. of Life Science and Informatics Maebashi Institute of Technology Maebashi-City 371-0816 Japan Beijing International Collaboration Base on Brain Informatics and Wisdom Services China Beijing Key Laboratory of MRI and Brain Informatics China

ISBN: (纸本)9783319098906

Although statistical graph comprehension has been investigated in cognitive psychology, it has not been reported in cognitive neuroscience. The study designed an experimental condition, i.e., a statistical graph (SG), and two control conditions, i.e., a text (ST) and a statistical graph with text (SGT), where the ST is a verbal description of the information from the SG, and the SGT is a mixed graph + textual description. We used fMRI to analyze the brain activity of 36 normal subjects while they passively view the statistical information presented in any of SG, ST, and SGT. The results indicate that statistical graph comprehension requires the involvement of both ventral and dorsal streams, with more dependence on the ventral stream than the dorsal. © 2014 Springer International Publishing.

关键词： Statistics

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