共查询到19条相似文献,搜索用时 125 毫秒
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首先探讨了结构化P2P网络中主动型蠕虫的发展历程、概念与特点,进而从传播模型、检测、防御3个方面综述了主动型P2P蠕虫的研究现状,最后对主动型P2P蠕虫研究未来的发展进行了展望。 相似文献
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P2P网络中沉默型蠕虫传播建模与分析 总被引:5,自引:0,他引:5
蠕虫给 Internet 带来巨大威胁,给作为 Internet 覆盖网的P2P网络带来的威胁更大,这主要是由P2P网络本身的特点决定的(就是这些特点为用户带来巨大方便).考虑到威胁P2P网络的3种蠕虫中沉默型蠕虫传播模型还没有被提出(其他2种分别为被动型蠕虫和主动型蠕虫)和沉默型蠕虫的巨大危害性,提出了沉默型蠕虫的传播模型和免疫模型,并基于该模型推导出了沉默型蠕虫不会流行的条件.为了考查各个P2P参数对蠕虫传播的影响和从实践上验证推导出的蠕虫不会流行的条件,使用Matlab进行了大量仿真实验.实验表明,理论推导出的蠕虫不会流行的条件是正确的;实验还进一步表明,蠕虫的流行程度是由流行指数来决定的,这为提出蠕虫控制策略提供了依据.通过对决定流行指数的几个参数的分析表明,在发现蠕虫时迅速降低下载率是补丁发布前控制蠕虫最有效的办法. 相似文献
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本文对P2P网络共享的特性和被动型蠕虫的传播特点进行了剖析.并基于模型试验结果的基础上举出了3个分别针对于蠕虫传描的模型。 相似文献
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A number of worms, named P2P (peer-to-peer) passive worms, have recently surfaced, which propagate in P2P file-sharing networks and have posed heavy threats to these networks. In contrast to the majority of Internet worms, it is by exploiting users’ legitimate activities instead of vulnerabilities of networks in which P2P passive worms propagate. This feature evidently slows down their propagation, which results in them not attracting an adequate amount of attention in literature. Meanwhile, this feature visibly increases the difficulty of detecting them, which makes it very possible for them to become epidemic. In this paper, we propose an analytical model for P2P passive worm propagation by adopting epidemiological approaches so as to identify their behaviors and predict the tendency of their propagation accurately. Compared with a few existing models, dynamic characteristics of P2P networks are taken into account. Based on this proposed model, the sufficient condition for the global stability of the worm free equilibrium is derived by applying epidemiological theories. Large scale simulation experiments have validated both the proposed model and the condition. 相似文献
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At present, P2P worm poses a serious threat to the Internet infrastructure and common users since it spreads extremely fast and is hard to be detected in early stage. In this paper, we propose a Four-factors Propagation Model (FPM) for passive P2P worms. There are two major contributions of this paper. Firstly, we take four critical factors—address hiding, configuration diversity, online/offline behaviors and download duration into consideration. As far as we know, the first two factors have not been considered in existing models yet. Secondly, we explicitly derive the differential equations of our FPM. Then worm behaviors in steady state are researched in depth by numerical methods. The following simulations give two suggestions for worm quarantining. On one hand, worms can be slowed down by increasing the proportion of hosts with internal addresses. One the other, breaking the configuration monocultures of hosts is an efficient way to contain worms. 相似文献
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Propagation of passive worms in unstructured peer-to-peer (P2P) networks can result in significant damages and the loss of network security. This paper obtains the average delay for all peers in the entire transmitting process, and proposes a mathematical model for simulating unstructured P2P networks-based passive worms' propagation taking into account network throughput. According to the file popularity which follows the Zipf distribution, we propose a new healthy file dissemination-based defense strategy. Some parameters related to the propagation of passive worms are studied based on the proposed model. Finally, the simulation results verify the effectiveness of our model, which can provide an important guideline in the control of passive worms in unstructured P2P networks. 相似文献
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社交网络内蠕虫的爆发对用户及社交网络造成了极大的威胁。将社交网络的普通用户和网络攻击者作为博弈双方,分析双方的行为策略集合及影响因素,得到收益矩阵的计算方法。基于博弈论确定用户面对信息超链接的点击概率,运行了仿真实验。实验结果表明,蠕虫伪装技术对蠕虫传播影响较大,用户安全意识程度则影响较小。当蠕虫危害度较小或信息价值度较大时,蠕虫传播速度将会加快。基于博弈论研究社交网络的蠕虫传播是可行的。 相似文献
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张少娴 《计算机技术与发展》2012,(11):141-144
P2P网络和P2P相关技术一直是计算机网络研究的一大热点。P2P网络具有大规模、高动态性的特点,这使得在真实环境中实际运行、测试一个它需要付出巨大的努力和昂贵的开销。而P2P模拟器具有的优势能为P2P网络研究带来很大的方便,研究者们只需要将精力集中于想要关注的性能,丽不必花费大量的时间和精力去编写实验工具。文中深入研究了PeerSim模拟平台上模拟P2P环境的构建方法,并在其上实现了一个简单的负载平衡算法。最后,通过实验来说明PeerSim模拟器的使用方法,展示了PeerSim组件化的构造思想和灵活的配置机制。 相似文献
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蠕虫之所以能够产生巨大的影响和危害,其中重要的一点是利用了其传播网络的无标度特性。鉴于此,对蠕虫在无标度网络上的传播行为及影响因素进行了研究。研究结果表明,通过采取恰当的策略,可以有效地控制蠕虫的传播,显著地降低蠕虫带来的影响。 相似文献
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