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宽带无线IP系统移动终端的安全接入技术 总被引:2,自引:0,他引:2
针对目前宽带无线IP系统移动终端的接入现状,本文基于公钥密码机制,提出了一种宽带无线IP系统移动终端的安全接入技术。该技术是无线通信技术、网络技术及密码技术相结合的产物,它不仅解决了目前无线IP系统中移动终端没有接入控制与非安全接入问题,而且完成了移动终端的接入控制,实现了其通信保密功能。持有证书的移动终端既可以本地接入,也可以异地登录,从而保障了其通信漫游功能。理论分析与实验结果均表明,该方案不仅切实可行,而且相比目前技术具有无可比拟的安全性。 相似文献
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随着越来越多的移动节点接入IPv6网络,目前主要的无线移动环境下的认证技术却难以适合移动IPv6需要。该文提出了一种无线移动IPv6接入认证系统,并详细描述了系统组成、工作流程、功能,最后给出了其在Linux下的实现。测试结果说明系统是高效、安全的。 相似文献
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IEEE 802.11无线自组织网络中采用随机方式接入无线信道,提供服务质量(QoS)保证难度很大。目前已提出媒体接入层机制以改进无线自组织网络服务质量。但单纯的媒体接入层服务质量机制同样具有较大局限性。本文系统分析比较了不同无线自组织网络环境下媒体接入层和网络层服务质量机制的性能,基于上述分析结果,提出一种跨层自组织网络服务质量机制。 相似文献
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无线Mesh网络是一种通过无线链路连接路由器和终端设备的无线多跳网络,是一种新型宽带无线接入技术,具有可靠性、自组织性和自愈性的特点。而且建网方便快捷,成本低,具有传统有线、无线网络系统无可比拟的优势和广阔的应用前景,能为无线个域网、局域网、校园网甚至城域网提供无线宽带接入服务。无线Mesh网络中的每个节点都具有路由转发功能,再加上网络中节点的频繁移动,使得路由技术成了无线Mesh网络中的关键技术。 相似文献
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移动计算机网络应用技术研究 总被引:2,自引:0,他引:2
移动计算机用户对Internet移动接入的需求急剧增长,移动计算机网络是因特网、移动通信系统和便携机相结合的重要发展方向。介绍了移动IP技术原理,非同质网络间数据传输控制的特点,移动通信空中接口宽带码分多址及无线局域网的技术特性和发展,并分析了当前在这些领域存在的问题。 相似文献
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Internet-based mobile ad hoc networking is an emerging technology that supports self-organizing, mobile networking infrastructures. The technology enables an autonomous system of mobile nodes, which can operate in isolation or be connected to the greater Internet. Mobile ad hoc networks (Manets) are designed to operate in widely varying environments, from forward-deployed military Manets with hundreds of nodes per mobile domain to applications of low-power sensor networks and other embedded systems. Before Manet technology can be easily deployed, however, improvements must be made in such areas as high-capacity wireless technologies, address and location management, interoperability and security. The authors give an overview of Manet technology and current IETF efforts toward producing routing and interface definition standards that support it within the IP suite 相似文献
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现代化矿井通信技术与系统 总被引:1,自引:0,他引:1
提出了由矿用有线调度通信系统、矿井移动通信系统、矿井广播通信系统和矿井救灾通信系统等组成的煤矿井下通信技术体系。提出矿用调度通信系统应采用矿用有线调度通信系统。提出全矿井移动通信系统宜采用WiFi、3G、4G等通信技术。提出矿井广播通信系统既可采用矿用有线调度通信系统远程供电广播技术,也可采用基于以太环网和无源光网络的IP通信技术。提出矿井救灾通信系统应采用无线多媒体通信技术,宜采用WiFi和MESH等通信技术。提出矿井移动通信系统应满足手机脱网通信、基站脱网通信、无线自组织网络、接入煤矿井下有线宽带传输平台等要求。指出在手机脱网通信、接入煤矿井下有线宽带传输平台、无线自组织网络、矿用无线摄像机、基站脱网通信、多功能矿井移动通信系统、矿井无线宽带传输等方面,WiFi优于WCDMA、CDMA2000和TD-SCDMA。提出多功能矿井移动通信系统和矿井无线宽带传输宜采用WiFi。 相似文献
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Ad hoc networks are self-configurable networks with dynamic topologies. All involved nodes in the network share the responsibility for routing, access, and communications. The mobile ad hoc network can be considered as a short-lived collection of mobile nodes communicating with each other. Such networks are more vulnerable to security threats than traditional wireless networks because of the absence of the fixed infrastructure. For providing secure communications in such networks, lots of mechanisms have been proposed since the early 1990s, which also have to deal with the limitations of the mobile ad hoc networks, including high power saving and low bandwidth. Besides, public key infrastructure (PKI) is a well-known method for providing confidential communications in mobile ad hoc networks. In 2004, Varadharajan et al. proposed a secure communication scheme for cluster-based ad hoc networks based on PKI. Since the computation overheads of the PKI cryptosystem are heavy for each involved communicating node in the cluster, we propose an ID-based version for providing secure communications in ad hoc networks. Without adopting PKI cryptosystems, computation overheads of involved nodes in our scheme can be reduced by 25% at least. 相似文献
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A survey of secure wireless ad hoc routing 总被引:5,自引:0,他引:5
Ad hoc networks use mobile nodes to enable communication outside wireless transmission range. Attacks on ad hoc network routing protocols disrupt network performance and reliability. The article reviews attacks on ad hoc networks and discusses current approaches for establishing cryptographic keys in ad hoc networks. We describe the state of research in secure ad hoc routing protocols and its research challenges. 相似文献
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《Computer Networks》2007,51(12):3632-3649
Ad hoc groups, such as peer-to-peer (P2P) systems and mobile ad hoc networks (MANETs) represent recent technological advancements. They support low-cost, scalable and fault-tolerant computing and communication. Since such groups do not require any pre-deployed infrastructure or any trusted centralized authority they have many valuable applications in military and commercial as well as in emergency and rescue operations. However, due to lack of centralized control, ad hoc groups are inherently insecure and vulnerable to attacks from both within and outside the group.Decentralized access control is the fundamental security service for ad hoc groups. It is needed not only to prevent unauthorized nodes from becoming members but also to bootstrap other security services such as key management and secure routing. In this paper, we construct several distributed access control mechanisms for ad hoc groups. We investigate, in particular, the applicability and the utility of threshold cryptography (more specifically, various flavors of existing threshold signatures) towards this goal. 相似文献
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Ad hoc无线网络中的组播路由协议 总被引:4,自引:0,他引:4
由固定网络、基础结构移动网络和非基础结构无线网络组成的集成网络将成为未来互联网发展的趋势。同时,面向组计算和组通信的需求不断增长,要求未来的集成网络能为用户提供组播通信的功能。Adhoc无线网络是非基础结构无线网络的典型代表,具有带宽有限、拓扑结构易变和电池能源有限的特点,这些特性使得未来集成网络实现组播通信具有一定的挑战性。该文在分析Adhoc无线网络基本特性的基础上,综合评述了新近的Adhoc网络组播路由协议的研究现状,并对几种典型的Adhoc网络组播路由协议的特点进行了分类分析和比较,最后讨论了Adhoc无线网络组播路由协议的发展趋势和挑战。 相似文献
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陈晔 《数字社区&智能家居》2009,(27)
随着时代的演进,网络通讯科技的发展也从有线网络演进到无线网络。其中移动AdHoc网络,更是备受瞩目。它是由许多具有无线装置的移动节点所动态构成的网络,节点与节点之间的通讯是经由其邻近的节点所传送,其特色是不需预先建构相关网络基础设施。该论文是建立在集群路由方式的移动AdHoc网络平台上,整合IPv6自动组态设定和SIP协定,以提供移动节点所需的IP地址,与相关位置指信息。并提出一个分散式路由机制,使网络内的终端机可与移动网络节点互相通讯。 相似文献
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刘永磊 《数字社区&智能家居》2007,(18)
随着无线网络的快速发展和移动计算应用的快速增加,移动无线网络安全问题愈加突出.入侵检测作为保证网络安全的一种有效手段已经从保护固定有线网络扩展到移动无线网络.作为无线移动网络众多实现方式之一的移动Ad Hoc网络分为平面和分级两种结构.由于其与有线网络存在很大差别,现有针对有线网络开发的入侵检测系统很难适用于移动Ad Hoc网络.本文在描述入侵检测相关技术的基础上改进了分级的AdHoc网络入侵检测系统体系结构,并给出了该系统的分簇算法,使之更好地应用于分级的Ad Hoc网络. 相似文献
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Yu-Chee Tseng Chia-Ching Shen Wen-Tsuen Chen 《Computer》2003,36(5):48-55
Extending traditional IEEE 802.11-based access points to incorporate the flexibility of mobile ad hoc networks would help make the dream of ubiquitous broadband wireless access a reality. The authors discuss several issues related to integrating the mobile Internet protocol with Manets. 相似文献