基于SRP-6协议的认证与密钥交换方案

针对Web服务中身份认证的问题,分析了SRP-6(Secure Remote Password-6)协议的密钥交换机制,提出了一种基于简单对象访问协议(SOAP)和SRP-6协议的认证与密钥交换方案(SRP-over-SOAP).该方案将SOAP消息进行扩展,通过在SOAP头中加入标记,实现了SOAP消息对SRP认证信息的传递.文中还将该方案用于Web服务,实现了服务器和客户机间的双向身份认证.     

基于动态身份的远程用户认证方案

对基于智能卡的具有匿名性的远程用户认证方案进行分析研究,发现该方案存在无法抵抗离线口令猜测攻击、内部人员攻击、冒充用户攻击和冒充服务器攻击等问题。针对这些安全漏洞,基于哈希函数和随机数给出了一个动态身份的远程用户认证方案。分析结果表明,改进的方案不仅弥补了原方案安全漏洞,而且用户可自由更新口令,适于实际应用。     

基于改进的Fiat－Shamir签名协议的组播认证方案

提出了一个新的组播认证方案,该方案基于改进的Fiat-Shamir签名协议和双哈希链技巧.Fiat-Shamir签名协议是基于零知识和二次剩余协议,安全性可以得到保证;双哈希链技巧的使用又大大提高了认证效率。     

基于多分支树结构的电力缴费终端数据完整性验证方案

针对电力缴费终端存在管理人员操作不当和黑客攻击等行为导致数据损坏和丢失等问题,设计了一种基于多分支哈希树结构的数据完整性防护验证方法。该方法利用基于双线性映射的签名机制和多分支树结构的特性,通过使用随机掩码技术对分块的数据进行随机化处理,以确保数据的隐私性,采用多分支树形结构实现对数据块的快速认证和快速签名,并利用哈希树节点的哈希值验证数据块的完整性,引入验证服务器对数据分块进行批量验证和证据计算,并通过设置备份服务器完成对存储数据的备份处理。实验结果表明,该方案可以有效提高对存储数据完整性的批量检测效率,并降低终端和主服务器的计算开销,同时具有较小的计算开销和较高的安全性。     

利用混沌映射的新定理提出了一种面向多服务器区块链架构的卸载服务器PAKE方案（英文）

目前,分布式密码认证密钥协议方案越来越受欢迎。与传统的3种体系结构(客户机/服务器、2种客户机/服务器和多服务器)相比,分布式体系结构可以解决单点安全、单点效率和单点故障问题。此外,它还具有可扩展性、灵活性和公平性。提出了一种新的基于混沌映射的分布式安全保护方案。该方案的优点是,在用户注册之后可以从服务器卸载链接的块链。它首先在3轮中实现了3个节点之间的互认证,保护了隐私,同时未注册的服务器可以暂时存储一个临时认证器,以提高效率。该方案的安全性是基于混沌映射的硬问题和一个安全的单向哈希函数。与相关文献相比,提出的方案不仅具有高效、独特的功能,而且对各种攻击具有鲁棒性,实现了完美的正向保密。最后,给出了该方案的安全性证明和有效性分析。     

基于过滤机制的Web服务可信远程认证

针对目前可信认证方案在认证效率和具体应用上的不足,提出了基于虚拟机的可信认证方案,并对Web服务器提出具体的认证策略,通过实验证明这种策略是可行和有效的。     

综合数字防伪方案

为了满足防伪条码生产及验证过程的安全性,提出采用数字进行产品防伪的综合方案。针对数字防伪的特征提出采用对称加密算法及哈希函数来产生防伪号码来保证其不可伪造性,并加入公钥加密算法保证对称算法密钥的安全;为防止网络上的木马程序攻击,提出在验证服务器和Web服务器间进行并口通信来保护验证服务器上敏感数据的安全,从而达到验证过程的安全性要求。最后,对方案可能遭到的攻击进行分析,结果表明方案是安全的。     

一种基于身份网格认证框架的零知识改进方案

针对基于身份的网格认证框架存在密钥服务器仿冒用户的风险,提出了用零知识的认证技术改进方案.方案保留了原认证框架的用户私钥和会话密钥生成机制;利用模运算的不可逆性,增加用户自己产生私密信息和身份公钥机制;运用哈希运算网格服务器将用户真实身份与身份公钥绑定,其他用户可查询验证;利用私密信息和身份公钥的相关性,只有拥有自己私密信息连接双方身份才可得到确认,因而其他任何用户无法仿冒.     

在ASP.NET中实现SQL SERVER数据库的匿名访问

Web数据库应用对来访者的身份认证分为Internet服务器(ⅡS)合法身份认证和数据库(SQL Serve)合法身份认证两层.当一个能匿名访问Internet服务器的用户不能匿名访问SQLServer数据库时,将不能获得数据库提供的服务,Web数据库应用难以实现.为此,笔者介绍了在利用ASP.NET进行Web应用程序设计中,匿名访问SQL SERVER数据库的方法.     

基于LP-MMSE的高效语音感知哈希认证算法

为了满足移动语音通信中对语音内容保持操作的鲁棒性和区分性,并实现高效认证等要求,提出一种基于线性预测最小均方差(LP-MMSE)的高效语音感知哈希认证算法.该算法首先对待认证语音进行预处理、分帧和加窗后的语音信号进行线性预测分析(LPC)得到其最小均方差(MMSE)系数矩阵;然后对分帧后的语音利用谱熵法计算得到每帧的谱熵值参数矩阵;最后结合上述两个矩阵,生成最终的二进制感知哈希序列.仿真结果表明,该算法的感知哈希摘要性优于现有的其它方法并对内容保持操作具有较好的鲁棒性和区分性,认证效率高,能够满足语音通信实时认证的要求.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-