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IEEE International Conference on e-Business Engineering (ICEBE)

作者： Zhensong Liao Hai Jin Deqing Zou Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Automated trust negotiation (ATN) is an important means to establish trust between strangers through the exchange of digital credentials and access control policies specifying what credentials a stranger must submit in the open and distributed environment. While ATN brings convenience, there are still two issues unsolved successfully: 1) to protect the transmitting message; 2) to prevent the sensitive information leakage. Hidden credential can provide high security level to protect sensitive resources, policies and credentials from being attacked. Zero-knowledge is an important means to avoid leakage and can be used to protect the user's private context and sensitive information from unauthorized inferences. If hidden credentials and zero-knowledge are well-combined and redesigned, they can jointly make ATN better. Based on these, a hidden credential based oblivious automated trust negotiation model (HBOA) is proposed in this paper. In the model, the negotiation information is carried by hidden credentials, which have the same secure level with elliptic curve. Zero-knowledge protocol is provided by Pedersen commitment scheme, which ensures that no sensitive information can be attained by authorized users. A practical example is given to prove its usability.

关键词： Information security Protection Protocols Identity-based encryption Access control Elliptic curves Elliptic curve cryptography Middleware computers grid computing

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A Scalable Service Scheme for Secure Group Communication in grid

A Scalable Service Scheme for Secure Group Communication in ...

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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： Yunfa Li Hai Jin Deqing Zou Jieyun Chen Zongfen Han Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

In this paper, we propose a scalable service scheme for secure group communication in grid. In the service scheme, a series of methods and strategies are presented, such as the initialization methods for group member, administrative domain and virtual organization, the key distribution strategy and the rekeying strategy. In order to improve the scalability of this service scheme, the services for a group are logically divided into two hierarchical levels, which is in accordance with the characteristics of group communication in grid. In addition, in order to show the efficiency and the scalability of the service scheme, simulation experiments are done. The results show that the service scheme is efficient and scalable. Thus, the service scheme can satisfy the requirement of people in large-scale, dynamic grid environment.

关键词： grid computing Scalability Large-scale systems Information security Public key computer science Distribution strategy Analytical models Broadcasting Protocols

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grid Security Interoperation between CGSP and VEGA

Grid Security Interoperation between CGSP and VEGA

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International Conference on Future Generation Communication and Networking (FGCN)

作者： Deqing Zou Hai Jin Xueguang Chen Zongfen Han Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9780769530482;0769530486

grid computing emerges as an effective technology to couple geographically distributed resources and solve large-scale computational problems in wide area networks. There are several popular grid platforms, such as UNICORE and Globus Toolkit. Many famous grid projects are constructed with these platforms, each of which manages different distributed resources. In order to aggregate resources managed by different grid platforms, it is necessary to implement the interoperation among these grid platforms. Security interoperation is one of key issues for the interoperation. CGSP (Chinagrid Support Platform) and VEGA are two popular grid platforms in China. To achieve security interoperation between these two platforms, four mapping policies, including user-user mapping, user-agora mapping, role-user mapping, role-agora mapping, are proposed in this paper. The security interoperation process is proposed based on SAML specification and the mapping policies. We also analyze the flexibility of mapping policies and the security of the interoperation process.

关键词： Security Resource management grid computing Authentication Large-scale systems computer networks Distributed computing Wide area networks Web services Middleware

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Providing VoD Services Based on Unstructured Overlay

Providing VoD Services Based on Unstructured Overlay

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2007年第三届语义和知识网格国际会议(Third International Conference on Semantics,Knowledge,and grid)(SKG 2007)

作者： Bin Cheng Hai Jin Xiaofei Liao Zongfen Han Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

It is still a challenging task to provide large scale video-on-demand (VoD) streaming services based on overlay network due to its inherent dynamicity and heterogeneity. Most of previous work has focused on how to construct a structured overlay to tackle this issue, i.e., tree-based overlay and DHT. However, they always suffer from inefficient resource utilization and poor reliability. In this paper, we propose a new solution based on unstructured overlay, called gridCast, in which a directional gossip protocol and a score-based partner selection algorithm are designed to explore multiple data suppliers for each joined peer. In this way, gridCast can make efficient use of the available upload bandwidth of peers to achieve better scalability and reliability. The experimental results from our early deployment show that it is feasible to provide scalable VoD services based on unstructured overlay.

关键词： Peer to peer computing Streaming media Bandwidth Protocols Algorithm design and analysis Scalability Web and internet services Costs Video sharing computers

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PBJIM: Plugin-based Job Interoperation Mechanism for Heterogeneous grid Systems

PBJIM: Plugin-based Job Interoperation Mechanism for Heterog...

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第六届网格与协同计算国际会议(The Sixth International Conference on grid and Cooperative computing GCC 2007)

作者： Song Wu Yongcai Tao Zhongqing Xu Service Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

With the development of grid technology, grid gains more popularity that ever and a variety of grid middlewares come into being. However, most of grid middlewares are developed by their own, and it's not easy to interoperate these grid platforms. Existing grid interoperability projects mainly resorts to case-by-case mechanism, which is simple but of poor scalability. Job management is the core and the most complex components of grid system. To realize the interoperability of heterogeneous grids, the interoperation of heterogeneous job managements must be addressed In the paper, a plugin based job interoperation mechanism for heterogeneous grid systems, called PBJIM, is proposed, which is based on the idea of virtualization and plug-in *** are two well-established grid systems in China,Chinagrid and China National grid, and they are built with two different grid middlewares, CGSP and VEGA. Via PBJIM, the interoperation of job management of these two grid systems is achieved.

关键词： Middleware grid computing Information management Identity management systems computer science Scalability Standards development Data security Information security Management information systems

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Negotiated Coscheduling in a P2P Based HPC Platform

Negotiated Coscheduling in a P2P Based HPC Platform

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第六届网格与协同计算国际会议(The Sixth International Conference on grid and Cooperative computing GCC 2007)

作者： Fei Luo Hai Jin Xiaofei Liao Qin Zhang Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

To promote peer-to-peer (P2P) based high performance computing (HPC), new scheduling strategies are necessarily designed to break the limitation in current systems, which only support applications with independent tasks. Therefore, we introduce a negotiated coscheduling policy, which supports applications with interactive tasks in a structured P2P based HPC platform, P2HP-2. In this policy, with the help of a project description file, a negotiated dispatching metric with two priorityentitling algorithms is proposed, which distributes tasks across computing resources. The coscheduling is further processed with two steps: spinning for dependent data and performing tasks' ***, a reliable message-event transmission method and a load balancer are developed to improve the performance. All our preliminary results show that this scheduling policy is efficient and fault-tolerant to support applications with task-dependent relationships.

关键词： Processor scheduling Distributed computing Concurrent computing Pervasive computing grid computing Internet computer science Peer to peer computing High performance computing Application software

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OCTOPUS: A Hybrid Scheduling Strategy for P2P VoD Services

OCTOPUS: A Hybrid Scheduling Strategy for P2P VoD Services

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第六届网格与协同计算国际会议(The Sixth International Conference on grid and Cooperative computing GCC 2007)

作者： Xiaofei Liao Hai Jin Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

Peer-to-Peer (P2P) networks have been shown to be a promising approach to provide large-scale Video on Demand (VoD) services over Internet for its potential high scalability. However, for a normal peer,how to efficiently schedule media data to multiple asynchronous peers for VoD services in such networks remains a major challenge. Hereby we propose a hybrid scheduling scheme for data dissemination in P2P VoD system in this paper, called OCTOPUS,which is combined with adaptive scheduling scheme at normal time and special scheduling strategy emergently. Usually each peer is given a value,meaning scheduling bandwidth to represent service capacity, which is an integrated evaluation for peer's bandwidth and services ability, also including statistical characteristics about historical data transferring. According to the value, one peer can adjust the expectation of each neighbor's abilities and send scheduling request of media data to all *** case of failure scheduling, emergent scheduling scheme will be called and limited data requests will be sent to media servers. OCTOPUS scheme helps to make sufficient utilization of end-peers' resource,alleviate the load of source server and improve their scalability. Experimental result from a P2P VoD system, gridCast, based on OCTOPUS schemes,shows that OCTOPUS achieves obvious effect.

关键词： Peer to peer computing Streaming media Bandwidth Network servers Processor scheduling Scalability grid computing Internet Web server computers

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HAND: Highly Available Dynamic Deployment Infrastructure for Globus Toolkit 4

HAND: Highly Available Dynamic Deployment Infrastructure for...

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Euromicro Conference on Parallel, Distributed and Network-Based Processing

作者： Li Qi Hai Jin Ian Foster Jarek Gawor Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory Huazhong University of Science and Technology Wuhan China Department of Computer Science University of Chicago USA Mathematics and Computer Science Division Argonne National Laboratory USA

grid computing is becoming more and more attractive for coordinating large-scale heterogeneous resource sharing and problem solving. Of particular interest for effective grid computing is a software provisioning mechanism. We propose a highly available dynamic deployment infrastructure, HAND, based on the Java Web services core of Globus toolkit 4. HAND provides capability, availability, and extensibility for dynamic deployment of Java Web services in dynamic grid environments. We identify the factors that have impact to dynamic deployment in static and dynamic environments. We also present the design, analysis, implementation, and evaluation of two different approaches to dynamic deployment (service level and container level), and examine the performance of alternative data transfer protocol for service implementations. Our results demonstrate that HAND can deliver significantly improved availability and performance relative to other approaches

关键词： grid computing Java Web services Availability Large-scale systems Resource management Problem-solving Performance analysis Containers Protocols

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Integrating Attribute and Status Constraint into the RBAC Model for Access Control in Ubiquitous Systems

Integrating Attribute and Status Constraint into the RBAC Mo...

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International Conference on Future Generation Communication and Networking (FGCN)

作者： Deqing Zou Jong Hyuk Park Tai-hoon Kim Xueguang Chen Cluster and Grid Computing Laboratory & Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology China Department of Computer Engineering Kyungnam University Masan Gyeongsangnam South Korea Hannam University South Korea Department of Control Science and Engineering Huazhong University of Science and Technology China

It now becomes a trend to implement the interconnections between resources as well as services in ubiquitous systems. Attribute-based authorization mechanisms, protocols and systems are gaining in popularity, such as SAML, XACML, Shibboleth, etc. However, their management efficiency could be further improved. The Role-based Access Control (RBAC) mechanism is widely accepted as a general mechanism for authorization management. However, RBAC is still not flexible enough to address various application scenarios in ubiquitous systems. We propose a new architecture for access control in ubiquitous systems that impose attribute and status constraints on the RBAC model, which can significantly enhance the generality and flexibility of authorization by integrating the advantages of RBAC and attributed- based access control models. Moreover, the state mechanism proposed in this architecture captures the states of the authorization elements so as to reflect the outcomes of the authorization control. Finally, we analyze the flexibility and generality of this architecture in ubiquitous systems.

关键词： Access control Authorization Permission grid computing Pervasive computing Access protocols Application software Markup languages computer science Control system analysis

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Key distribution strategy of security multicast in grid

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2007年第4期35卷 769-777页

作者： Li, Yun-Fa Jin, Hai Zou, De-Qing Han, Zong-Fen Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

In grid, it is an important strategy that using multicast to realize the large-scale information resource sharing. However, it is very difficult to ensure the security of multicast. In this paper, based on the basic principles of the centralized key distributed strategy and the distributed key distribution strategy, according to the multicast mechanism in grid, considering the dynamic factors of multicast members, we present the member hierarchy method for key distribution, the member discovery protocol, the clustering protocol and the key distribution strategy, thus constituting the key distribution strategy of security multicast in grid. In order to validate the feasibility and the availability of this strategy, a simulation experiment is done. The results show that it is feasible and efficient to ensure the security multicast in grid.

关键词： Multicasting

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