检索结果-内蒙古大学图书馆

Threshold Quantum Secret Sharing of Secure Direct Communication

Chinese Physics Letters 2009年第1期26卷 21-24页

作者：李宝奎杨宇光温巧燕 Department of Automatic Control School of Information Science and Technology Beijing Institute of Technology Beijing 100081 College of Computer Science and Technology Beijing University of Technology Beijing 100124 State Key Laboratory of Integrated Services Network Xidian University Xi'an 710071 State Key Laboratory of Information Security Graduate University of Chinese Academy of Sciences Beijing 100049 State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876

We propose a （L, n）-threshold quantum secret sharing protocol of secure direct communication following some ideas of Zhang＇s protocol [Phys. Lett. A 342 （2005） 60] and Tokunaga et al.＇s protocol [Phys. Rev. A 71 （2005） 012314]. The sender distributes the classical secret shares to his or her n agents and each agent owns a secret share in advance. The sender＇s secure direct communication message can be extracted by an agent subset by collaboration in such a way that at least t or more agents can obtain the secret message with the mutual assistances but any t - 1 or fewer agents cannot. In contrast to the previous multiparty quantum secret sharing protocols in which the sender＇s secret message can be recovered only if all the agents collaborate, our protocol is more practical and more flexible.

关键词： QUANTUM communication computer network protocols DIGITAL communications MESSAGE theory (Communication) MATHEMATICAL physics WIRELESS communication systems

来源：评论

学校读者我要写书评

暂无评论

Yarqs: Yet Another Range Queries Schema in DHT Based P2P Network

Yarqs: Yet Another Range Queries Schema in DHT Based P2P Net...

引用

International Conference on computer and Information technology (CIT)

作者： Hao Zhang Hai Jin Qin Zhang 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

Range query in DHT based P2P network is a hot topic in recent researches. The hashing function in DHT protocols makes the data hard to keep their original order relationship. Hence range queries for such networks become difficult. This paper presents the design of Yarqs-a new schema to achieve range queries in DHT based P2P networks. By using the inherent characteristics of DHT based networks, Yarqs catches the data pass the nodes and organizes them as a cache network. The range queries are deployed over the cache network. Yarqs does not change the design of the DHT overlay and builds the architecture for range queries by using the historical DHT queries data. Yarqs supports inherent load balancing. We also study the performance of Yarqs in evaluation section. The experiments to check the influences of different parameters of Yarqs are deployed and analyzed.

关键词： Load management Peer to peer computing Data structures Protocols Grid computing computer networks Information technology computer science Dictionaries Costs

来源：评论

学校读者我要写书评

暂无评论

VRFPS: A Novel Virtual Machine-Based Real-time File Protection system

VRFPS: A Novel Virtual Machine-Based Real-time File Protecti...

引用

International Conference on Software Engineering Research, Management and Applications (SERA)

作者： Feng Zhao Yali Jiang Guofu Xiang Hai Jin Wenbin Jiang 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

With the development of virtualization technology, file protection in virtual machine, especially in guest OS, becomes more and more important. Traditional host-based file protection system resides the critical modules in monitored system, which is easily explored and destroyed by malwares. Moreover, in order to protect the multiple operation systems running on the same platform, it is necessary to install independent file protection system for each of them, which greatly wastes computing resources and brings serious performance overhead. In this paper, a novel VM-based real-time file protection system, named VRFPS, is proposed to solve these problems. First, virtual machine monitor introspects all file operations of guest OS. Then, semantic gap between disk block and logic files is narrowed by blktap. Finally, a virtual sandbox is implemented in privileged domain to prevent protected files in guest domain from modifying illegally. Our approach is highly isolated, transparent and without modification on virtual machine monitor and guest OS. The experimental results show that the presented system is validate and of low performance overhead.

关键词： Real time systems Protection Virtual machining Kernel Operating systems Virtual machine monitors Application virtualization Data security Access control Software engineering

来源：评论

学校读者我要写书评

暂无评论

PMonitor: A Lightweight Performance Monitor for Virtual Machines

PMonitor: A Lightweight Performance Monitor for Virtual Mach...

引用

International Workshop on Education technology and computer science, ETCS

作者： Zhiyuan Shao Hai Jin Xiaowen Lu 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

Performance monitor for virtual machines can monitor the performance metrics of virtual machines and gain the resource consumption status, and thus provide reliable basis for system performance evaluation and further management. However, at current stage, such performance monitor systems for the virtualized systems are inadequate and inefficient. In this paper, we propose a lightweight performance monitor system model for virtual machines, called PMonitor. Through prototype implementation and experiments, we find that PMonitor consumes very few processing power, which is much lower than other open source performance monitors running on the virtualized environments.

关键词： Condition monitoring Virtual machine monitors Virtual machining Measurement Performance gain system performance Resource management Power system management Power system modeling Virtual prototyping

来源：评论

学校读者我要写书评

暂无评论

Optimize Performance of Virtual Machine Checkpointing via Memory Exclusion

Optimize Performance of Virtual Machine Checkpointing via Me...

引用

ChinaGrid Annual Conference (ChinaGrid)

作者： Haikun Liu Hai Jin Xiaofei Liao 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

Virtual machine (VM) level checkpoints bring several advantages which process-level checkpoint implementation can hardly provide: compatibility, transparence, flexibility, and simplicity. However, the size of VM-level checkpoint may be very large and even in the order of gigabytes. This disadvantage causes the VM checkpointing and restart time become very long. To reduce the size of VM checkpoint, this paper proposes a memory exclusion scheme using ballooning mechanism, which omits saving unnecessary free pages in the VM. We implement our prototype in Xen environment. Experimental measurements show our approach can significantly reduce the size of VM checkpoint with minimal runtime overhead, thereby greatly improve the checkpoint performance.

关键词： Virtual machining Checkpointing Virtual manufacturing Virtual machine monitors Hardware Operating systems Containers Encapsulation Fault tolerant systems Availability

来源：评论

学校读者我要写书评

暂无评论

VDE: Seamless Mobility on Desktop Environment

VDE: Seamless Mobility on Desktop Environment

引用

IEEE International Symposium on Dependable, Autonomic and Secure computing (DASC)

作者： Xiaofei Liao Xianwen Chen Hai Jin Zongfen Han 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

Virtual desktop environment (VDE) provides a real virtual working environment in which users could personally customize and update the application list from application template libraries. The heterogeneous applications actually running in the remote application servers could cooperatively communicate with each other. It is a thin client approach to mobility in which the perfect combination of VM technology and DFS technology are the keys to the rapid seamless resuming of the usage scenarios. Usage scenarios are incrementally suspended including the user's documents and the running applications. The usage data stored in data center provides a unified view for the users through historical scenario manager and ensures the data's security and reliability at the same time. This paper explores the building policy of a real virtual working environment and the suspending/resuming policy of usage scenarios. Experiments demonstrate and evaluate VDE's efficiency and effectiveness.

关键词： Application software Layout Displays Virtual machining Resumes Grid computing Linux Switches Image storage computers

来源：评论

学校读者我要写书评

暂无评论

Live virtual machine migration with adaptive, memory compression

Live virtual machine migration with adaptive, memory compres...

引用

IEEE International Conference on Cluster computing

作者： Hai Jin Li Deng Song Wu Xuanhua Shi Xiaodong Pan 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

Live migration of virtual machines has been a powerful tool to facilitate system maintenance, load balancing, fault tolerance, and power-saving, especially in clusters or data centers. Although pre-copy is a predominantly used approach in the state of the art, it is difficult to provide quick migration with low network overhead, due to a great amount of transferred data during migration, leading to large performance degradation of virtual machine services. This paper presents the design and implementation of a novel memory-compression-based VM migration approach (MECOM) that first uses memory compression to provide fast, stable virtual machine migration, while guaranteeing the virtual machine services to be slightly affected. Based on memory page characteristics, we design an adaptive zero-aware compression algorithm for balancing the performance and the cost of virtual machine migration. Pages are quickly compressed in batches on the source and exactly recovered on the target. Experiment demonstrates that compared with Xen, our system can significantly reduce 27.1% of downtime, 32% of total migration time and 68.8% of total transferred data on average.

关键词： Virtual machining Virtual manufacturing Degradation Voice mail Power system management Load management Fault tolerant systems Energy management Chromium computers

来源：评论

学校读者我要写书评

暂无评论

Fast Isosurface Extraction for Medical Volume Dataset on Cell BE

Fast Isosurface Extraction for Medical Volume Dataset on Cel...

引用

International Conference on Parallel Processing (ICPP)

作者： Hai Jin Bo Li Ran Zheng Qin Zhang 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

The size of volumetric data generated by medical imaging and scientific simulations is increased significantly due to the dramatic advances in medical imaging modalities and computing technologies. The volumetric data generally need to be visualized and marching cubes algorithm (MC for short) is one of the standard methods of the isosurface extraction for the medical applications. However, MC algorithm requires a large amount of data computing power. The cell broadband engine (Cell for short) processor, which is a typical COTS (commodity off-the-shelf) heterogeneous designed to handle extremely demanding computations, can be used to hasten isosurface extraction in medial application. In this paper, we present a streaming model-based scheme to efficiently map MC algorithm to Cell. Specifically, a block-based filter running on PPE is imposed as a preprocessing stage to avoid unnecessary data transfer and computation, and the MC kernel runs on SPEs as the subsequent stage. Through tuning the size of the block, the workload of PPE and SPE is orchestrated harmoniously. The experimental results demonstrate that overall isosurface extraction speedup of more than 10 times is achieved compared with conventional heavy iron CPUs.

关键词： Isosurfaces Data mining Biomedical imaging Computational modeling Medical simulation computers Data visualization Medical services Biomedical equipment Engines

来源：评论

学校读者我要写书评

暂无评论

The Theory of Triangle Type-2 Fuzzy Sets

The Theory of Triangle Type-2 Fuzzy Sets

引用

International Conference on computer and Information technology (CIT)

作者： Zehua Lv Hai Jin Pingpeng Yuan 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

Interval type-2 fuzzy set is the most popular kind of type-2 fuzzy set, its characteristic is that all the secondary membership functions equal to 1. Though interval type-2 fuzzy sets can reduce the calculation complexity than other type-2 fuzzy sets, it loses much fuzzy information simultaneously. In order to solve this problem we propose a novel theory of triangle type-2 fuzzy sets, the formulas for union, intersection and complement of triangle type-2 fuzzy sets are derived and proven in detail. In addition, the relationship and the conversion between triangle type-2 fuzzy sets and interval type-2 fuzzy sets are discussed.

关键词： Fuzzy sets Fuzzy set theory Uncertainty Grid computing Fuzzy systems Gaussian distribution Frequency selective surfaces Information technology computer science Artificial intelligence

来源：评论

学校读者我要写书评

暂无评论

DVM-MAC: A Mandatory Access Control system in Distributed Virtual computing Environment

DVM-MAC: A Mandatory Access Control System in Distributed Vi...

引用

International Conference on Parallel and Distributed systems (ICPADS)

作者： Deqing Zou Lei Shi Hai Jin 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

We design and implement a Mandatory Access Control (MAC) system in distributed virtual computing environment, named DVM-MAC, aiming to provide distributed trust through enforcing MAC policies. In DVM-MAC, Prioritized Chinese Wall (PCW) model is implemented to control potential covert channels between VMs in both single node and distributed environment. A policy enforcement module locates inside Xen VMM for better enforcing MAC locally rather than outside the VMM. DVM-MAC adopts centralized architecture for multi-level management and secure transmission of inter-node policy information. For performance consideration, a specific policy decision and enforcement module for controlling inter-node behaviors is moved out of Xen VMM and up to user space. DVM-MAC authorizes a specific center node named Central Security Server (CSS) to be responsible for the decision making between the nodes as well as leaves the inter-node policy enforcement module in each node. Through our experiments and data analysis, we verify the correctness, effectiveness, and efficiency in our prototype when implementing PCW model.

关键词： Access control Distributed computing Voice mail Virtual manufacturing Virtual machining Hardware Grid computing Operating systems Concurrent computing Resource virtualization

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：