共查询到20条相似文献,搜索用时 125 毫秒
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黄成兵 《智能计算机与应用》2016,(5)
介绍移动自组网的特点、发展与现状,并与现有通信手段进行分析对比,指明移动自组网在各类灾后营救中的相比传统通信手段所更能发挥的积极作用,展望移动自组网在各个领域中的应用前景。 相似文献
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移动自组网MANET(Mobile Ad Hoc Networks)是一种新型的无线移动网络,由于它具有开放的媒质、动态的拓扑、分布式合作以及网络能力受限等特点,因此特别容易受到攻击。路由安全是MANET安全中的重要一环。介绍了移动自组网的路由协议以及面临的路由安全问题,重点分析了AODV路由协议的寻路过程以及其存在的安全问题之一———黑洞。在分析了一些已有解决方案存在的缺点的基础上,提出了一种新的解决方案,该方案有效地解决了黑洞问题,并消除了已有方案存在的漏洞。 相似文献
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移动自组网中基于多跳步加密签名 函数签名的分布式认证 总被引:26,自引:1,他引:26
移动自组网Manet(Mobile Ad Hoc Network)是一种新型的无线移动网络,由于其具有网络的自组性、拓扑的动态性、控制的分布性以及路由的多跳性,所以,传统的安全机制还不能完全保证Manet的安全,必须增加一些新的安全防范措施.本文探讨了Manet所特有的各种安全威胁,提出了一种基于多跳步加密签名函数签名的安全分布式认证方案,即将移动密码学与(n,t)门槛加密分布式认证相结合,并采用了分布式容错处理算法和私钥分量刷新技术以发现和避免攻击者假冒认证私钥进行非法认证以及保护私钥分量和认证私钥不外泄. 相似文献
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由于移动自组网Manet(Mobile Ad-hoc Networks)是一个无中心的网络且不存在值得信任的结点,传统的公平非抵赖协议因需要一个固定可信第三方TTP(Trusted Third Party)而不足以保证Manet的高效性和安全性.本文在可信平台模块TPM(Trusted Platform Module)的安全体系结构基础上提出了一种Manet中基于动态第三方的可信公平非抵赖协议,以取代固定TTP,提高协议效率,并运用TPM完整性度量技术和DAA(Direct Anonymous Attestation)远程认证技术,保证证据可信.最后利用Event B对该协议进行形式化建模,证明其有效性和公平性. 相似文献
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A growing application area in mobile communications is mobile teleconferencing, in which a group of mobile users collaborate in an interactive procedure, such as a board meeting, a task force, a scientific discussion, or even a virtual classroom. Wireless communications transmit conversations via radio, making them more susceptible to eavesdropping and unauthorized access than are conversations carried via wires. Therefore, it is crucial to ensure confidentiality and authenticity in mobile teleconferencing. When deploying secure services in mobile teleconferences, it has to be taken into account that the mobility of users is usually built on portable devices with limited computing capability. A secure conference scheme for mobile communications needs to be executed efficiently on portable devices. We propose a new secure and efficient conference scheme for mobile communications. Based on a modular square root technique, this scheme is secure against eavesdropping, impersonating, and tracking attacks and allows a participant to join or quit a mobile teleconference dynamically. In addition, the scheme is particularly efficient on the mobile user's portable device because the mobile user needs to perform only single modular multiplication plus encryptions and decryptions of a secret key cryptosystem. 相似文献
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Yuh‐Min Tseng 《International Journal of Network Management》2007,17(1):3-15
A mobile ad hoc network does not require fixed infrastructure to construct connections among nodes. Due to the particular characteristics of mobile ad hoc networks, most existing secure protocols in wired networks do not meet the security requirements for mobile ad hoc networks. Most secure protocols in mobile ad hoc networks, such as secure routing, key agreement and secure group communication protocols, assume that all nodes must have pre‐shared a secret, or pre‐obtained public‐key certificates before joining the network. However, this assumption has a practical weakness for some emergency applications, because some nodes without pre‐obtained certificates will be unable to join the network. In this paper, a heterogeneous‐network aided public‐key management scheme for mobile ad hoc networks is proposed to remedy this weakness. Several heterogeneous networks (such as satellite, unmanned aerial vehicle, or cellular networks) provide wider service areas and ubiquitous connectivity. We adopt these wide‐covered heterogeneous networks to design a secure certificate distribution scheme that allows a mobile node without a pre‐obtained certificate to instantly get a certificate using the communication channel constructed by these wide‐covered heterogeneous networks. Therefore, this scheme enhances the security infrastructure of public key management for mobile ad hoc networks. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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Xun Yi Chee Kheong Siew Tan C.H. Yiming Ye 《Wireless Communications, IEEE Transactions on》2003,2(6):1168-1177
A growing application area in mobile communications is mobile teleconference in which a group of mobile users collaborate in an interactive procedure, such as a board meeting, a task force, a scientific discussion, or even a virtual classroom. Wireless communications transmit conversations via radio, making them more susceptible to eavesdropping and unauthorized access than are conversations carried via wires. Therefore, it is crucial to ensure confidentiality and authenticity in a mobile teleconference. The authors design a new secure conference scheme for mobile communications. Based on a modular square root technique, this scheme is secure against eavesdropping, impersonating, and tracking attacks and allows a participant to join or quit a mobile teleconference dynamically. 相似文献
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移动通信网中端端认证方案的研究 总被引:4,自引:0,他引:4
现有的数字移动通信网中提供移动用户与基地地间的保密通信服务,移动用户的间的端端保密通信在移动通信网中还是一个新问题。本文分析了已有端端认证方案的安全性,提出了一种单钥体制域内端端认证方案和一种单钥/双钥混合体制域间端端认证方案。分析结果结果:新方案不仅安全性很高,而且利用于移动端的实现,也便于网络端的密钥管理。 相似文献
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Hu Bin Jin Chenhui 《电子科学学刊(英文版)》2006,23(1):54-57
Proxy signature is a special digital signature which enables a proxy signer to sign messages on behalf of the original signer. This paper proposes a strongly secure proxy signature scheme and a secure multi-proxy signature scheme based on elliptic curve cryptosystem. Contrast with universal proxy signature schemes, they are secure against key substitute attack even if there is not a certificate authority in the system, and also secure against the original signer's forgery attack. Furtherlnore, based on the elliptic curve cryptosystem, they are more efficient and have smaller key size than other system. They can be used in electronics transaction and mobile agent environment. 相似文献
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Min-Shiang Hwang 《Vehicular Technology, IEEE Transactions on》1999,48(5):1469-1474
We propose a scheme to implement secure digital mobile communications. The scheme can both enable multiple users to hold a secure teleconference and also resolve the problem of allowing a participant to join dynamically or to quit a teleconference already in progress. Essentially, teleconference is a synchronous collaboration session in which participants at remote locations cooperate through wireless communications. Two requirements for the system are: privacy and authentication. Privacy signifies that an eavesdropper cannot intercept conversations of a conference. Authentication ensures that the service is not obtained fraudulently in order to avoid usage charge usage. We present a conference key distribution scheme for digital mobile communications, according to which users can share a common secret key to hold a secure teleconference over a public channel. The participants need not alter their secret information when a participant joins late or quits the conference early 相似文献
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