SSL协议实现与PKI体系的支持

安全套接字层(SSL)协议是一个网络安全通信协议,数字证书是应用SSL协议进行认证和加密的先决条件,证书的签发和管理需要由机构完成。本文简单介绍了SSL协议及实现方法,提出了CA机构的模式。     

企业应用系统整合中的CAS单点登录技术

针对企业应用系统单点登录的需要,提出一种基于中央认证服务器(CAS)的单点登录技术方案.系统中,认证管理器通过责任链模式管理认证执行者,客户端浏览器与认证服务器之间采用HTTPS协议,认证服务器与平台应用服务器之间采用HTTP协议.在访问业务系统时,相关信息的传递均结合时间戳、关键信息加密签名和SSL加密通道技术.在自动认证完成后,业务系统可根据需要设定是否继续走安全套接层协议(SSL)加密通道,既保证单点登录过程中信息传递的保密性和真实性.又兼顾业务系统访问的安全与效率.     

一种基于SSL的VPN的研究与实现

虚拟专用网VPN(V irtual Private Networks)是解决公共网络中私有信息安全传输的重要技术,而安全套接层协议SSL(Secure Sockets Layer)是近年来兴起的一种实现VPN的有效方法.文中介绍了SSL VPN技术的概念及相关原理,最后给出了一个利用Openvpn软件基于SSL的VPN的实现.     

浅谈电子商务中的安全问题

围绕电子商务中的安全问题,分析了安全套接层协议(SSL),安全电子交易协议(SET)和公钥基础设施(PKI)及它们应用的侧重点。     

会话状态重用在铁路电子商务中的应用

对目前铁路电子商务网站客票发售系统所使用的安全协议SSL(SecureSocketsLayer,安全套接层 )进行了详细分析 ,指出了协议各部分的开销降低发售系统客户响应速率的弊端 ,并提出了减少协议开销、提高发售系统客户响应速率的一种方法 :会话状态重用 (sessionstatereuse) ,同时描述了网站服务器组设备配置的技术方法     

安全套接层SSL的Web服务器安全实现策略研究

Web服务器与浏览器之间的安全通信是进行安全的在线交易的基础.介绍了用于Web服务器的安全套接字层协议SSL的基本原理,给出了一个基于BSD许可的集成SSL的Web服务器的实例,并探讨了增强SSL协议中对称分组加密算法实现性能的方法和发展方向.     

基于OpenSSL的AES算法改进

随着Internet的发展和Web技术的普及应用,Web安全已成为目前亟待解决的安全问题之一.而SSL(Secure Socket Layer)协议作为一种有效的解决方案被广泛使用.但是,SSL协议的核心加密算法受到出口的限制,不能满足我国信息安全的需要.因此,对SSL协议及其实现进行分析和研究具有一定的实践意义.在深入地分析和研究SSL协议原理及其安全隐患和性能属性的基础上,针对Open SSL采用C语言对其中的AES(Advanced Encryption Standard)算法进行了改进实现.对AES算法的改进主要用指针类型转换的方法改进加密解密函数中的移位操作,最终实现了效率上的提高.     

基于SSL协议安全通信原理与实现

SSL(Secure Sockets Layer)是用于web的安全通信标准.被设计用来使用TCP时提供一个可靠的点到点安全服务,保证两个通讯个体之间的保密性和完整性.openssl是SSL的一份完整实现,内部包含了大量加密算法程序.文章介绍了SSL协议的工作原理,并使用openssl实现SSL协议的安全网络通信过程.     

基于SSL隧道封装的JDBC安全连接技术

为保护客户端和数据库之间的通信，使用基于SSL隧道封装的JDBC安全连接技术。对安全通讯协议SSL(Security Socket Layer安全套接层)和JDBC驱动程序的主要类型作了简要介绍，给出SSL之上隧道封装方式来保证JDBC驱动程序的安全传输的模型和示例程序。     

基于公开密钥基础设施的单点登录系统的设计

研究一种安全性高、应用范围广的单点登录系统.通过使用公开密钥基础设施和中间件技术,设计并实现了一种基于公开密钥基础设施的单点登录系统.通过实现授权应用登录代理、基于安全套接字层(SSL)协议的身份认证及登录凭证库的集中管理,能够完成对授权应用的安全、透明登录.构建了独立的认证机构(CA),不需要对现有应用做任何改动,就能实现一个安全、透明、使用方便的单点登录系统.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that