蜜罐诱骗防御机理的博弈理论分析

论文运用博弈理论形式化描述了蜜罐诱骗中各博弈局中人的策略与收益,通过求解博弈均衡策略及均衡条件,分析推理了传统蜜罐在网络攻防博弈中的有效性和局限性,证明了蜜罐是一种被动式主动防御手段。讨论了符合防御者预期的理想诱骗博弈均衡策略,剖析了影响诱骗博弈有效性和主动性的要素条件,并受生物拟态现象启发,给出了提高诱骗主动性和有效性的策略建议,为构建主动有效的蜜罐诱骗防御手段提供了理论支持。     

蜜罐技术研究新进展

蜜罐技术是网络防御中的陷阱技术,它通过吸引诱骗攻击者并记录其攻击行为,从而研究学习敌手的攻击目的和攻击手段,保护真实服务资源。然而,传统蜜罐技术存在着静态配置、固定部署等先天不足,极易被攻击者识别绕过而失去诱骗价值。因此,如何提高蜜罐的动态性与诱骗性成为蜜罐领域的关键问题。该文对近年来国内外蜜罐领域研究成果进行了梳理,首先总结了蜜罐发展历史,随后以蜜罐关键技术为核心,对执行过程、部署方式、反识别思想、博弈理论基础进行了分析;最后,对近年来不同蜜罐防御成果分类叙述,并对蜜罐技术发展趋势进行了分析陈述,针对潜在安全威胁,展望新兴领域防御应用。     

一种研究型虚拟蜜罐网络的设计与实现

信息时代的到来需要计算机安全防护从被动防御转为主动防御，从而使蜜罐技术在网络对抗中日益受到重视。蜜罐技术研究的重点在于如何设计一个严格控制的网络诱骗环境。文中设计并实现了一个研究型虚拟蜜罐网络。首先，提出了虚拟蜜网的总体设计目标及蜜网拓扑结构，然后，实现了蜜罐网络并分析了各功能模块。对蜜罐网络的攻击测试结果表明该蜜罐网络达到了设计目标。     

网络安全之蜜罐技术篇

本文从多个方面对蜜罐技术进行全面的阐述。首先介绍蜜罐的概念，阐述它的安全价值。然后介绍4种不同的蜜罐配置方式：诱骗服务、弱化系统、强化系统和用户模式服务器，并根据不同的分类原则对蜜罐进行分类。然后介绍了。些典型的蜜罐产品，最后总结了蜜罐的优缺点及其发展趋势。     

具有指纹库扩展功能的蜜罐系统开发研究

蜜罐是一种通过伪装成真实系统或服务来诱骗攻击者的网络安全技术。蜜罐有着许多其他网络安全技术无法比拟的优点,已经成为当前网络安全领域里研究的热点。首先介绍蜜罐的概念以及开源蜜罐软件Honeyd的基本特点和基本要素,然后介绍基于Honeyd所开发的蜜罐诱捕系统,最后指出该蜜罐系统指纹库无法更新的缺陷,并提出重要的改进方案。     

基于蜜罐的入侵检测系统的博弈分析与设计

论文从博弈论的角度,对引入蜜罐技术的入侵检测系统进行了架构分析和模块分析,并对一般的入侵和入侵检测行为进行了描述,最后提出了入侵检测中博弈过程模型。     

蜜罐识别技术研究

蜜罐技术是一种欺骗入侵者以达到采集黑客攻击方法和保护真实主机目标的诱骗技术,它的核心价值在于被探测、被攻击或者被威胁,以此达到对这些攻击活动的检测与分析,从而了解攻击者的目的、攻击手段甚至于心理习惯,最终实现从观察攻击者的行为中学习到深层次的信息保护的方法。在蜜罐技术的应用过程中,最为关键的一点就是蜜罐系统对攻击者所具有的迷惑性。从蜜罐系统特有的系统特征、硬件特征以及网络特征出发,分析各种蜜罐系统或者虚拟机系统中可能存在的一些可识别的特性,提出一些识别方案并针对部分方法进行了编程识别,希望能够引起安全行业的重视,能够推动蜜罐技术的发展。     

蜜罐技术发展初探

目前,传统网络防护技术都是在攻击者对网络进行攻击时对系统进行被动的防护,蜜罐技术是一种主动防御技术,可以诱骗攻击,记录入侵过程,及时获得攻击信息并以此来深入分析各种攻击行为。文章从蜜罐技术发展历程的角度来阐述蜜罐、蜜网、蜜场等技术原理及其在实际中的典型应用。     

基于主动防御的蜜罐技术研究

文章介绍了一种主动防御技术——蜜罐技术。首先给出了蜜罐的定义和分类,然后分析了蜜罐的关键技术,讨论了虚拟蜜罐技术和动态蜜罐技术两个热点问题,最后对蜜罐的发展趋势进行了展望。     

基于蜜罐的主动网络安全系统的研究与实现

采用自动的大规模扫描,在发现系统漏洞后,能够使对手在短时间内攻破计算机系统。传统的蜜罐系统在处理这些问题时有很多不足,因为其签名是可检测的。针对这些不足,本文从另一个角度构造了一个基于蜜罐的主动网络安全系统(Active Network Security System,ANSS)的诱骗系统。 ANSS位于真实的网络环境中,可以自始至终捕获到黑客的行为。仿真实验表明,ANSS使网络的安全性能达到了一个较高的水平,对入侵行为的监控和预防有着重要的意义。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.