排序方式: 共有130条查询结果,搜索用时 171 毫秒
1.
An efficient and security dynamic identity based authentication protocol for multi-server architecture using smart cards 总被引:1,自引:0,他引:1
《Journal of Network and Computer Applications》2012,35(2):763-769
Generally, if a user wants to use numerous different network services, he/she must register himself/herself to every service providing server. It is extremely hard for users to remember these different identities and passwords. In order to resolve this problem, various multi-server authentication protocols have been proposed. Recently, Sood et al. analyzed Hsiang and Shih's multi-server authentication protocol and proposed an improved dynamic identity based authentication protocol for multi-server architecture. They claimed that their protocol provides user's anonymity, mutual authentication, the session key agreement and can resist several kinds of attacks. However, through careful analysis, we find that Sood et al.'s protocol is still vulnerable to leak-of-verifier attack, stolen smart card attack and impersonation attack. Besides, since there is no way for the control server CS to know the real identity of the user, the authentication and session key agreement phase of Sood et al.'s protocol is incorrect. We propose an efficient and security dynamic identity based authentication protocol for multi-server architecture that removes the aforementioned weaknesses. The proposed protocol is extremely suitable for use in distributed multi-server architecture since it provides user's anonymity, mutual authentication, efficient, and security. 相似文献
2.
3.
融合通信业务是提供语音、视频、数据和信息服务的综合业务.该业务提供自助服务门户系统,供集团客户管理员和个人用户对业务进行统一管理,业务门户使用SSH(Spring,Struts,Hibernate)框架搭建系统架构,但传统的基于SSH框架的系统实现方式不能满足该业务丰富的业务需求,因此需要对系统的业务逻辑层进行扩展.本文首先介绍融合通信业务组网环境和自助服务门户系统的功能需求,进而分析该系统对业务逻辑层的区别于其它系统的特殊需求,然后给出了业务逻辑层的扩展方案和具体实现.该业务逻辑层可以与复杂组网环境中的多种设备进行通信,充分发挥了SSH框架的能力. 相似文献
4.
To improve the efficiency and the quality of a service, a network operator may consider deploying a peer-to-peer architecture among controlled peers, also called here nano data centers, which contrast with the churn and resource heterogeneity of peers in uncontrolled environments. In this paper, we consider a prevalent peer-to-peer application: live video streaming. We demonstrate how nano data centers can take advantage of the self-scaling property of a peer-to-peer architecture, while significantly improving the quality of a live video streaming service, allowing smaller delays and fast channel switching. We introduce the branching architecture for nano datacenters (BAND), where a user can “pull” content from a channel of interest, or content could be “pushed” to it for relaying to other interested users. We prove that there exists an optimal trade-off point between minimizing the number of push, or the number of relaying nodes, and maintaining a robust topology as the number of channels and users get large, which allows scalability. We analyze the performance of content dissemination as users switch between channels, creating migration of nodes in the tree, while flow control insures continuity of data transmission. We prove that this p2p architecture guarantees a throughput independently of the size of the group. Analysis and evaluation of the model demonstrate that pushing content to a small number of relay nodes can have significant performance gains in throughput, start-up time, playback lags and channel switching delays. 相似文献
5.
6.
随着科技的进步和产业自动化水平的提高,计算能力作为一种资源越来越受到社会的重视和认可。云计算作为一项蓬勃发展的技术,在很大程度上解决了人们日益增长的对计算能力的需求。如今越来越多的企事业单位开始建立私有的Iaa S云平台以满足其组织内部的IT需求。面对复杂多样的组网需求,如何建立一个安全而可靠网络已成为一个重要课题。本文旨在设计与实现一种通用的Iaa S云平台资源池的网络管理系统,以满足私有云建设中对网络资源的纳管需求。 相似文献
7.
Service composition (SC) generates various composite applications quickly by using a novel service interaction model. Before composing services together, the most important thing is to find optimal candidate service instances compliant with non-functional requirements. Particle swarm optimization (PSO) is known as an effective and efficient algorithm, which is widely used in this process. However, the premature convergence and diversity loss of PSO always results in suboptimal solutions. In this paper, we propose an accurate sub-swarms particle swarm optimization (ASPSO) algorithm by adopting parallel and serial niching techniques. The ASPSO algorithm locates optimal solutions by using sub-swarms searching grid cells in which the density of feasible solutions is high. Simulation results demonstrate that the proposed algorithm improves the accuracy of the standard PSO algorithm in searching the optimal solution of service selection problem. 相似文献
8.
针对无线传感器网络资源受限的特点,研究了故障管理的相关内容,主要对故障管理的几种常见体系结构进行比较说明,对于无线传感器网络的应用具有一定的指导意义。 相似文献
9.
10.
设计了一种针对多媒体彩铃项目Portal系统的统一开发框架,并举例说明该框架在多媒体彩铃业务中的应用.UP(Unify Portal)框架基于传统的Spring+Hibernate开发框架,延续并优化了分层的体系结构;使用了面向接口编程和AOP(Aspect Oriented Programming,面向切面编程)的设... 相似文献