共查询到18条相似文献,搜索用时 115 毫秒
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良性蠕虫对抗恶性蠕虫是结构化P2P环境下应对蠕虫攻击的有效手段之一,但是已有模型对对抗环境下蠕虫传播过程的描述过于复杂。针对这个问题,提出一种简单的结构化P2P蠕虫对抗模型。该模型利用逻辑矩阵对结构化P2P网络中恶性蠕虫与良性蠕虫的对抗传播过程进行形式化描述,借助模型可以快速地推导出对抗环境下影响恶性P2P蠕虫传播效率的关键因素。此外考虑到P2P节点搅动特征对蠕虫传播的重大影响,将节点变化率引入到模型中,以提高模型的准确性。实验表明,借助形式化逻辑矩阵能有效地降低对抗环境下蠕虫传播模型的复杂度,快速地发现制约蠕虫传播的关键因素,为后续的蠕虫防御提供指导。 相似文献
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数以百万计的网络用户使用P2P网络来共享文件。但在P2P网络中,蠕虫则感染了大量的漏洞主机,并对信息设施和终端系统带来巨大的破坏。该文分析了P2P体系结构内在的风险,阐明了P2P蠕虫所带来的威胁,并且列举了威胁P2P网络的3种非扫描类型的螭虫:被动式蠕虫,反应式蠕虫和主动式蠕虫。鉴于这种情况,该文提出了一种能够减轻P2P蠕虫威胁的对策。 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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Xia Chunhe Shi Yunping Li Xiaojian Gao Wei 《Frontiers of Computer Science in China》2007,1(1):114-122
P2P worm exploits common vulnerabilities and spreads through peer-to-peer networks. Despite being recognized as a potential
and deadly threat to the Internet recently, few relevant countermeasures are found in extant literature. Once it breaks out,
a P2P worm could result in unpredictable losses. Based on propagation characteristics of the worm, this paper presents a detection
method called PWD (P2P Worm Detection), which is designed based on application identification and unknown worm detection.
Simulation result and LAN-environment experiment result both indicate that PWD is an effective method to detect and block
P2P worms.
Translated from Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(8): 998–1002 [译自: 北京航空航天大学学报] 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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对等网络蠕虫利用对等网络的固有特征(如本地路由表、应用层路由等),不仅复制快,而且提供了更好的隐蔽性和传播性,因而其危害大,防御困难。从分析互联网蠕虫及其传播机制入手,对对等网络上的蠕虫(即P2P蠕虫)及其特殊性进行了综合分析。在此基础之上,提出了基于良性益虫的被动激活主动传播防御策略(PAIFDP),并对该策略的技术原理和响应防御系统的功能模块等进行了详细设计。以Peersim仿真平台为基础,对各种不同网络参数下的防御效果和资源消耗情况进行了实验分析。结果表明,基于良性益虫的P2P蠕虫防御技术具有收敛时间快、网络资源消耗少、适应性强等特点。 相似文献