检索结果-内蒙古大学图书馆

International Conference on Intelligent Pervasive computing (IPC)

作者： Xuping Tu Hai Jin Xiaofei Liao Qi Huang Hong Yao Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9780769530062;0739530060

In P2P live streaming system, service will be degraded when thousands of semi-riders, peers with very limited outbound bandwidth, concurrently join. Due to the limited outbound bandwidth, a semi-rider peer always gets more data than its contributions. In this paper, we propose VolunteerLive, an incentive-based P2P live streaming model, to address this issue. In VolunteerLive, these asymmetrical users are encouraged to "deposit" their bandwidth resources to relay data using their network bandwidth resources. They can enjoy the services as semi-riders in the future. We also propose ContriMax, a heuristics data scheduling algorithm designed for volunteers to collect and maximize the contributions of them. Simulations have been conducted to evaluate the performance of the proposed VolunteerLive and ContriMax. The results show that VolunteerLive model is feasible to support more semi-riders and greatly decrease the stress on the media server.

关键词： Bandwidth Peer to peer computing Scheduling algorithm Streaming media Algorithm design and analysis Pervasive computing Grid computing Computer science Degradation Relays

来源：评论

学校读者我要写书评

暂无评论

Building an automated trust negotiation system

Building an automated trust negotiation system

引用

International Conference on Information, Communications and Signal Processing

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

ISBN: (纸本)9781424409822;1424409829

Automated trust negotiation (ATN) is an important means to establish trust between strangers through the exchange of digital credentials and mobile access control policies specifying what combinations of credentials a stranger must submit. While ATN provides a good mechanism to share resources in the distributed environments, there still exist some problems in ATN. A notable issue is that it is difficult to build a practical system. And no guidance is given on how to realize an ATN system. Previous work focused on presenting trust negotiation models or schemes, and most work aimed at protecting privacy and preventing sensitive information from leaking. In this paper, we pay much attention on how to build an ATN system, and design and implement a toy ATN system. We present a new means to implement access control policy, digital credential and its matching. A use case is studied to prove the toy system is sound and reasonable.

关键词： Access control Protocols Protection Grid computing Computer science Mobile computing Privacy Authentication Authorization LAN interconnection

来源：评论

学校读者我要写书评

暂无评论

PKTown: A Peer-to-Peer Middleware to Support Multiplayer Online Games

PKTown: A Peer-to-Peer Middleware to Support Multiplayer Onl...

引用

International Conference on Multimedia and Ubiquitous Engineering (MUE)

作者： Hai Jin Hong Yao Xiaofei Liao Sirui Yang Wei Liu Yong Jia Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China School of Computer Science and Technology China University of Geoscience Wuhan China

Peer-to-peer (P2P) system can support service for lots of end users with little hardware investment, which suits for the efforts to lower down the service cost for multiplayer online games (MOG). In this paper, we introduce PKTown, a P2P middleware inserted into Star Craft and the network layer. PKTown captures all packets generated by Star Craft. We apply application layer multicast (ALM) to transmit the broadcast packets through overlay network. PKTown extends the LAN game experiences to players belong to different LAN. We design a k-regular random overlay network based on game specific requirements analysis. No change is made on binary code of Star Craft. Preliminary test results show that PKTown works well and supports other MOG in the same way. Our contribution is to provide a new game experience method with little hardware investment.

关键词： Peer to peer computing Middleware Local area networks Hardware Investments Web server Costs Broadcasting Binary codes Testing

来源：评论

学校读者我要写书评

暂无评论

Grid Security Interoperation between CGSP and VEGA

Grid Security Interoperation between CGSP and VEGA

引用

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

来源：评论

学校读者我要写书评

暂无评论

HAND: Highly Available Dynamic Deployment Infrastructure for Globus Toolkit 4

HAND: Highly Available Dynamic Deployment Infrastructure for...

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Key distribution strategy of security multicast in grid

引用

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

来源：评论

学校读者我要写书评

暂无评论

A Component Based Design Tool for Networked Embedded Software Supporting Non-Functional Analysis

A Component Based Design Tool for Networked Embedded Softwar...

引用

International Conference on Grid and Cooperative computing Workshops (GCCW)

作者： Ke Shi Services Computing Technology and System Laboratory School of Computer Science & Technology Huazhong University of Science and Technology Wuhan China

In this paper a new approach for building networked embedded software is presented. The approach is based on the composition of reusable components with the addition of a perspective contract principle for modeling non-functional properties. Nonfunctional properties are an important aspect of networked embedded software, and this is why they are modeled separately. As such, the component view presented here differs from traditional component based views, where focus is laid on the functional part. The ideas discussed in the paper have been implemented in a tool. This tool enables the construction of networked embedded software by means of components and perspective contracts. Currently, a queuing network based algorithm that considers all non-functional properties together performs a static analysis on the perspective contracts before execution of the application

关键词： Embedded software Contracts Application software Embedded system Performance analysis Algorithm design and analysis Buildings Programming Computer networks Embedded computing

来源：评论

学校读者我要写书评

暂无评论

Real virtual environment applications - Now 3

Real virtual environment applications - Now

引用

3rd Conference on Visualization, VIS 1992

作者： Breen, Paul T. Grinstein, Georges G. Mizell, David W. Satava, Richard M. Smith, Bradford Stephens, Michael M. Zeltzer, David Department Head Applied Technology MITRE Corporation BedfordMA United States Continental C3 MITRE Corporation BedfordMA United States Institute for Visualization and Perception Research Computer Science Department University of Massachusetts Lowell LowellMA United States Computing Systems and Environments Boeing Computer Services SeattleWA United States General Surgery Silas B. Hays Army Hospital Fort OrdCA United States University of San Francisco BerkeleyCA United States System Engineering Division Computer Sciences Corporation VicksburgMS United States Computer Graphics and Animation Group Media Laboratory Massachusetts Institute of Technology CambridgeMA United States

来源：评论

学校读者我要写书评

暂无评论

gECC: A GPU-based high-throughput framework for Elliptic Curve Cryptography

引用

ACM Transactions on Architecture and Code Optimization 1000年

作者： Qian Xiong Weiliang Ma Xuanhua Shi Yongluan Zhou Hai Jin Kaiyi Huang Haozhou Wang Zhengru Wang Huazhong University of Science and Technology Wuhan China School of Computer Huazhong University of Science and Technology Wuhan China University of Copenhagen Copenhagen Denmark School of computer science and technology Huazhong University of Science and Technology Services Computing Technology and System Laboratory / Cluster and Grid Computing Laboratory Wu hanwu China NVIDIA Corp Shanghai China

Elliptic Curve Cryptography (ECC) is an encryption method that provides security comparable to traditional techniques like Rivest–Shamir–Adleman (RSA) but with lower computational complexity and smaller key sizes, making it a competitive option for applications such as blockchain, secure multi-party computation, and database security. However, the throughput of ECC is still hindered by the significant performance overhead associated with elliptic curve (EC) operations, which can affect their efficiency in real-world scenarios. This paper presents gECC, a versatile framework for ECC optimized for GPU architectures, specifically engineered to achieve high-throughput performance in EC operations. To maximize throughput, gECC incorporates batch-based execution of EC operations and microarchitecture-level optimization of modular arithmetic. It employs Montgomery’s trick [40] to enable batch EC computation and incorporates novel computation parallelization and memory management techniques to maximize the computation parallelism and minimize the access overhead of GPU global memory. Furthermore, we analyze the primary bottleneck in modular multiplication by investigating how the user codes of modular multiplication are compiled into hardware instructions and what these instructions’ issuance rates are. We identify that the efficiency of modular multiplication is highly dependent on the number of Integer Multiply-Add (IMAD) instructions. To eliminate this bottleneck, we propose novel techniques to minimize the number of IMAD instructions by leveraging predicate registers to pass the carry information and using addition and subtraction instructions (IADD3) to replace IMAD instructions. Our experimental results show that, for ECDSA and ECDH, the two commonly used ECC algorithms, gECC can achieve performance improvements of 5.56 × and 4.94 ×, respectively, compared to the state-of-the-art GPU-based system. In a real-world blockchain application, we can achieve performance impr

关键词： Elliptic curve cryptography modular multiplication GPU acceleration

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：