基于SSL VPN技术的跨域校园网接入系统的研究与应用

基于SSL协议的VPN技术具有简单易行,实施成本低,安全性高的特点。结合陇南师专校园网多校区互联及共享网络资源的情况,采用SSL VPN技术实现跨域校园网互联及数字资源共享的使用和研究。     

基于VPN技术的档案信息系统远程访问研究

针对校园网外不能访问校内档案信息系统的问题,通过分析我院档案信息系统远程访问的现状,提出基于VPN技术远程访问内网档案信息系统资源。又对现有 VPN 技术自身特点的分析,比较了 SSL VPN、IP Sec VPN、MPLS VPN之后,提出以SSL VPN技术为基础远程访问校内档案信息系统,并且通过开源软件OPEN VPN架设VPN服务器,从而使校园网外的广大师生员工可以安全、快捷地访问校内档案信息系统。     

关于SSL VPN技术用于校园网的探索

本文主要分析了分析了什么是校园SSL VPN技术以及它的特点,从而提出了校园SSL VPN技术配置的方式,希望能够为我国校园SSL VPN技术的发展与应用提供一些理论上的参考。     

Array揭开SSL VPN的六大行业"迷局"

SSL VPN是采用SSL协议来实现远程登录的VPN技术,作为后来居上者,SSL VPN较之前辈IPSec VPN、PPTP VPN等有着诸多天然的优势,比如部署简单、应用方便、更安全、控制性更强、扩展性更灵活、性价比更高、维护成本更低等等.     

SSL VPN的概念与选型

目前关于什么是SSL VPN的说法不一,也不乏有鱼目混珠的产品,打着SSL VPN的幌子欺骗用户。为帮助广大用户识别真假优劣,我们在此探讨一下“什么是真正的SSL VPN”。从概念角度来说,SSL VPN即指采用SSL(Security Socket Layer)协议来实现远程接入的一种新型VPN技术。SSL协议是网景公司提出的基于WEB应用的安全协议,它包括:服务器认证、客户认证(可选)、SSL链路上的数据完整性和SSL链路上的数据保密性。对于内、外部应用来说,使用SSL可保证信息的真实性、完整性和保密性。目前SSL协议被广泛应用于各种浏览器应用,也可以应…     

安全移动办公解决方案简析

办公自动化系统极大地提升了企、事业单位的工作效率和管理能力,但对工作节奏快、出差率高的企、事业单位来说,如何实现安全移动办公则更为重要。本文在分析实现移动办公需考虑的安全问题、技术与解决方案的基础上,系统介绍了吉林联通“电脑+数字证书+SSL VPN 设备”模式下的安全移动办公系统的建设与应用,最后对该系统的创新点进行了阐述与说明。     

VPN技术在校园网中的应用

本文介绍了VPN的概念,简要分析了VPN技术及类型;分析了目前高校校园网建设中遇到的一些问题;介绍了VPN相关技术在校园网中的应用;描述了VPN在校园网中的技术实现。     

基于虚拟网卡的传输安全技术研究

论文对SSL与VPN技术进行了研究,提出了一种基于虚拟网卡的SSL VPN系统构架,设计与实现了基于虚拟网卡的SSL VPN系统.采用基于UDP,TCP两种协议的信道自适应、信道自恢复等技术,大大提高了传输性能与系统健壮性,能够应对更复杂的网络条件与应用环境.     

SSL VPN在电子资源共享中的运用

使用VPN技术实现校外用户访问学习平台资源,是一种安全可靠、切实可行的应用方案。文章介绍了VPN的原理和几种重要的实现技术,分析了SSL VPN网络安全技术的基本原理及其实际应用。     

基于SSL加密隧道的VPN的研究与应用

SSL VPN是一种利用SSL/TLS协议进行虚拟隧道加密的新型VPN系统。简单介绍了SSL协议和常见VPN实现技术以及它们的不足之处;并使用开源软件OpenVPN设计了一个安全健壮的VPN系统。经实际使用,取得了良好的效果。     

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.     

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.     

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.     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks