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在计算机网络中实现跨越式发展的前提下,即时通讯技术越来越受到人们的重视。通过即时通信特点的分析,并介绍了国内流行的移动即时通信客户端-服务器,我们可以看到,目前即时通信技术对中国人的交际中的重要作用。它还列出了即时通讯工具可能出现的安全威胁,嵌入式实时通信技术将是即时通信技术发展的新方向。 相似文献
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在互联网中客户端都是采用域名的方式访问站点,域名到IP地址的映射由DNS域名解析服务器完成,一旦DNS域名解析服务器发生故障,将直接导致网站无法访问.LINUX是继UNIX功能的一种集安全性和高稳定性一体的开源和免费的操作系统.使用LINUX操作系统构建DNS域名解析服务器,通过使用区域传输来构建辅助DNS,能加强互联网站点的域名解析的安全性和容错功能. 相似文献
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P2P技术又称对等网络技术,和传统的客户端—服务器网络相比,P2P网络具有非中心化、身份对等、可扩展性等优势,因此在即时通信领域中,P2P技术逐渐受到重视。文章从总体上概述了P2P技术的特点以及该技术在即时通信领域的应用,并从用户网络信息安全的角度对该技术在即时通信应用中的安全问题加以分析,并提出了可行的应对策略。 相似文献
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能力开放平台是一个提供电信能力开放的移动互联网开放平台,向开发者提供丰富的业务能力,包括:短信、彩信、地图、定位等。能力开放平台接入系统需要异步处理客户端的HTTP请求,而平台内部各个系统间的消息传递也需要使用大量的异步HTTP请求。Netty是一款异步的事件驱动的网络应用开源框架,用于快速开发可维护的高性能、高扩展性协议服务器和客户端。本文简述了通过对开源框架Netty的源码封装,提供方便易用可以发送异步HTTP请求的客户端的设计思路和具体实现。 相似文献
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即时通信行业经历了近几年的飞速发展,业务功能已经从传统的互联网文字即时消息向互联网语音、视频通信发展,这样的发展状况已经引起了固网运营商的高度重视。同时,互联网即时通信也在向移动化扩张,目前已经出现了腾讯QQ与短信捆绑的业务和基于手机终端的QQ客户端。在未来,即时通信必将会在移动领域的深度和广度上进一步拓展,进而影响移动通信行业格局。一、即时通信行业现状从1999年腾讯推出QQ算起,即时通信在中国的发展已经有6年左右的时间。截至2004年8月份,几大即时通信提供商的注册用户数如表1所示,随着互联网尤其是宽带用户数的迅速增长,未来若干年内中国即时通信用户数量还会猛增。目前在个人即时通信市场上,代表娱乐方向的腾讯和代表商务方向的微软MSN已成为主流。在确立了各自领域的领先者地位后,它们又纷纷向对方的用户 相似文献
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《现代电子技术》2017,(15):47-51
为实现有效共享IT系统信息,提出基于桌面云终端的无线即时通信系统设计。首先,利用集群服务器建立私有云环境,在此条件下即时通信系统可通过分层次异构融合的无线移动P2P构建完成,移动设备存储终端由云终端提供,将代理节点设置在无线P2P网络边界上并使其融入无线P2P网络中,在无线移动网络和云终端完成异构融合的基础上实现即时通信系统的分层分级管理;其次,在考虑即时通信性质的基础上,使用C/S模式和客户端间的点对点模式在网络通信中设计即时通信系统的客户登录模块以及状态控制模块等功能模块。通过测试实验表明,以建立在桌面云终端为基础的无线即时通信系统能够快速反应且稳定性较强。 相似文献
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《Latin America Transactions, IEEE (Revista IEEE America Latina)》2007,5(3):192-201
Nowadays, Instant Messaging is a very successful service thanks to its versatility and simplicity in the communication offered to users, which is a key feature for the demanding environment of connectivity and mobility that modern society requires. With the success of mobile telephony, new alternatives for this kind of services appear however, an environment of low and complex interoperability was the result of protocols and transport technologies diversity. This article describes PAUMIN (Universal Access Platform to Mobile Instant Messaging), a universal platform that enables the communication between different instant messaging providers using mobile devices. This project was performed by the Mobile and Wireless Applications Development Interest Group (W@PColombia), assigned to Telematics Engineering Group, University of Cauca, Colombia. 相似文献
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本文根据即时通讯(IM)的协议模型,在TCP层和即时通讯协议层分析了阻断即时通讯的可能性,分别提出了基于TCP层和即时通讯协议层的协议分析的阻断策略.在TCP层,通过插入FIN报文或RST报文,以关闭TCP连接(特别是与登录服务器的连接);在即时通讯协议层,通过对相应字段的值进行设置,使客户端进入不活动状态.为使阻断策略能够有效地实施,本文也提出了一个消息驱动的实现算法.通过对Yahoo! Messenger的阻断实验,证明了本文提出的方法能够高效地完成阻断任务(平均数据包量不超过2.5个).用统计分析的方法对它们的性能进行比较,结果表明各种方法的效率在不同的背景流量下没有显著的差异,通过消息驱动算法实现的基于协议分析的阻断策略,其工作效率不受背景流量的影响.另外,即时通讯数据的触发方式,使得发送的阻断包的数量与背景流量无关,也不对网络负载造成明显的影响.本文的工作为实施即时通讯的阻断提供了有效的解决方案. 相似文献
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With the increasing importance of cloud services worldwide, the cloud infrastructure and platform management has become critical for cloud service providers. In this paper, a novel architecture of intelligent server management framework is proposed. In this framework, the communication layer is based on the Extensible Messaging and Presence Protocol (XMPP), which was developed for instant messaging and has been proven to be highly mature and suitable for mobile and large scalable deployment due to its extensi-bility and efficiency. The proposed architec-ture can simplify server management and increase flexibility and scalability when managing hundreds of thousands of servers in the cloud era. 相似文献
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即时通讯(IM)是一种非常受欢迎的互联网应用。在当今中国,有十多个即时通讯产品正占据着市场的主要份额。微信作为即时通讯产品的一种,其所具有的传播有效性、扩散持续性、更新及时性、互动便利性,使得其在即时通讯的市场份额中异军突起。本文主要通过对微信使用者的访谈和对相关文献的整理确定了微信广泛使用的影响因素,即通讯效果、社会影响及休闲娱乐。 相似文献
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Debiao He 《Ad hoc Networks》2012,10(6):1009-1016
With the continue evaluation of mobile devices in terms of the capabilities and services, security concerns increase dramatically. To provide secured communication in mobile client–server environment, many user authentication protocols from pairings have been proposed. In 2009, Goriparthi et al. proposed a new user authentication scheme for mobile client–server environment. In 2010, Wu et al. demonstrated that Goriparthi et al.’s protocol fails to provide mutual authentication and key agreement between the client and the server. To improve security, Wu et al. proposed an improved protocol and demonstrated that their protocol is provably secure in random oracle model. Based on Wu et al.’s work, Yoon et al. proposed another scheme to improve performance. However, their scheme just reduces one hash function operation at the both of client side and the server side. In this paper, we present a new user authentication and key agreement protocol using bilinear pairings for mobile client–server environment. Performance analysis shows that our protocol has better performance than Wu et al.’s protocol and Yoon et al.’s protocol. Then our protocol is more suited for mobile client–server environment. Security analysis is also given to demonstrate that our proposed protocol is provably secure against previous attacks. 相似文献
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Khalid Mahmood Aniqa Rehman Pradeep Chaudhary Xiong Li Fan Wu Saru Kumari 《International Journal of Communication Systems》2020,33(4)
Rapid evolution in information and communication technologies has facilitated us to experience mobile communication in our daily routine. Mobile user can only avail the services from the server, once he/she is able to accomplish authentication process successfully. In the recent past, several researchers have contributed diverse authentication protocols for mobile client‐server environment. Currently, Lu et al designed two‐factor protocol for authenticating mobile client and server to exchange key between them. Lu et al emphasized that their scheme not only offers invincibility against potential security threats but also offers anonymity. Although this article reveals the facts that their protocol is vulnerable against client and server impersonation, man‐in‐the‐middle, server key breach, anonymity violation, client traceability, and session‐specific temporary attacks, therefore, we have enhanced their protocol to mitigate the above mention vulnerabilities. The enhanced protocol's security strength is evaluated through formal and informal security analysis. The security analysis and performance comparison endorses the fact that our protocol is able to offer more security with least possible computation complexity. 相似文献
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基于Symbian OS的XMPP协议的实现 总被引:1,自引:0,他引:1
即时通信(IM)已成为继电话、传真、E-mail之后一种最重要的沟通与交流方式,特别在移动互联网上的应用占有越来越重要的地位,而XMPP协议是IM的标准协议,把XMPP协议移植到智能手机操作系统中,特别是占有智能手机市场首位的Symbian OS中,并在此协议栈上开发IM应用软件具有广泛的市场意义。本文首先分析了移植开源XMPP协议到Symbian OS的可行性,然后提出了代码移植步骤,最后根据代码移植步骤给出了移植XMPP协议栈的具体实践。 相似文献
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即时通讯软件已成为继电子邮件和Web之后的第三大互联网应用;同时,作为即时通讯的形式之一,网络会议型的服务和即时通讯平台的融合将随着技术的不断成熟和进步而受到越来越多的重视.基于SIP/SIMPLE协议和IP组播技术的网络音频会议的实现模型,描述了如何通过SIP信令的交互完成对基于组播的会话业务的控制.该方案在提高了网络和主机资源的利用率的同时,借助SIP协议自身的简单性和可扩展性,使得不仅实现简便,而且可以在此基础上提供更加丰富的业务及控制功能. 相似文献