软硬件协同的安全录入系统开发

键盘录入信息的保护大多采用安全软件的方式,无法防止按键信息在录入至计算机途中被硬件记录器非法窃取,且硬件记录器无法被安全软件查杀。本文结合USB驱动技术设计一种可加密防侧录的USB键盘录入系统,通过可加密的USB键盘配合计算机端USB驱动解密的方式,提高按键信息的安全性。测试结果表明,该系统可有效保护按键信息在传输过程中的安全。     

Windows RootKit技术原理及防御策略

RootKit是特洛伊木马后门工具,通过修改操作系统软件,使攻击者获得持续的系统访问权并隐藏在计算机中。本文将详细讨论Windows下的RootKit技术原理和检测技术,同时为了保卫系统和网络安全,提出了一套完整的针对RootKit的安全防御策略。     

信息输入方式自动转换的实现

在FoxBASE数据库编程中,经常要求使用者做各类信息的输入工作,系统使用者也随各种输入信息的不同进行输入方式的转换,通常这些操作都要在用户的人工干预下完成。那么能否在应用系统编写中根据录入信息的需要来完成录入方式的自动转换呢?本文针对这个问题,利用FoxBASE与汇编语言的接口技术,通过汇编语言编程来模拟键盘按键操作顺利地实现了这种设计思想。 在中文DOS下,所有通过键盘的输入的     

信息输入方式自动转换的实现

在FoxBASE数据库编程中,经常要求使用者做各类信息的输入工作,系统使用者也随各种输入信息的不同进行输入方式的转换,通常这些操作都要在用户的人工干预下完成。那么能否在应用系统编写中根据录入信息的需要来完成录入方式的自动转换呢?本文针对这个问题,利用FoxBASE与汇编语言的接口技术,通过汇编语言编程来模拟键盘按键操作顺利地实现了这种设计思想。     

RootKit在Linux下的工作原理及其检测

该文介绍了RootKit的相关概念以及它给计算机系统与网络安全带来的威胁,并分析了RootKit的分类方式及其各类RootKit的工作原理和实现方法。最后针对不同类型的RootKit,给出了相应的检测、清除及防范手段。     

RotKit在Linux下的工作原理及其检测

该文介绍了RootKit的相关概念以及它给计算机系统与网络安全带来的威胁,并分析了RootKit的分类方式及其各类RootKit的工作原理和实现方法.最后针对不同类型的RootKit,给出了相应的检测、清除及防范手段.     

一种基于行为的RootKit检测方法

介绍了RootKit技术的基本原理以及对于RootKit的常用检测方法,分析了RootKit的主要行为,提出了基于行为的RootKit检测方法.     

Windows RootKit检测与取证技术研究

文章首先对近几年来Windows RootKit检测技术的发展和研究进行了描述,接着对当前常用的RootKit检测工具及其检测方法做了介绍,进而探讨了Windows RootKit的取证与分析方法,以期对当前计算机取证人员有效解决Windows RootKit检测和取证提供一些借鉴。     

浅议PKI／CA技术在网上银行安全保障方面的应用

随着网络技术的不断发展,网上银行的应用日益广泛。但是,网上银行也存在很多风险,这会妨碍网上银行的应用,而且人们在应用网上银行时最关心的就是安全问题。因此,必须要在网上银行中运用PKI／CA技术,以保障网上银行交易的安全性,保证交易的双方身份的真实性,保证信息传递的完整性,保证交易的公正性。     

轻松击碎RootKit的隐身重甲

RootKit后门程序(例如"黑客守护者")利用了操作系统的模块化技术,将自身作为系统内核的一部分来运行。和普通的木马后门相比,具有强大的功能和隐蔽性。从RootKit的运行特点说,它可以隐藏进程信息、用户信息、系统服务、注册表主键和键值,还能开启远程Shell,截取键盘输入信息,查看和结束进程,重启系统。面对几乎堪称完美的RootKit后门,难道我们就真的束手无策了吗?     

生物识别技术在网上银行认证安全体系的应用

阐述了如何在现有的网上银行信息安全机制上应用基于生物特征的身份认证识别技术，将自动指纹识别、加密技术与网上银行3者有机结合，达到有效提高网上银行交易的安全性的目的。     

标准键盘布局比较与优化设计

键盘作为基本的人机交互设备之一,在多个领域有广泛的应用。对于标准键盘,现有的Qwerty键盘布局并不是为提高工作效率而设计的。而键盘输入作为一个复杂的人体工程学问题,依赖于操作者的习惯、不同手指的易用性差异以及不同的文本信息等诸多因素。在键盘输入过程分解、手指参数假定和语言文本分析之上,通过定义距离矩阵和文本矩阵,为标准键盘布局比较和优化设计建立较为客观的评价模型,并对现有键盘布局进行比较。作为应用,给出了针对汉语拼音输入的新键盘布局,并利用实际文本进行了测试与比较。     

Data Entry for Mobile Devices Using Soft Keyboards: Understanding the Effects of Keyboard Size and User Tasks

As mobile, handheld computing devices become more common and are used for an ever-increasing variety of tasks, new mechanisms for data entry must be investigated. Personal digital assistants often provide a small stylus-activated soft keyboard, as do some mobile phones that include touch screens. However, there is little data regarding the importance of keyboard size or the users' tasks, the effectiveness of these keyboards, or user reactions to these keyboards. In this article, an experiment designed to investigate these issues in the context of a palm-style QWERTY keyboard is described. In this study, 30 novices completed 6 realistic tasks using either a small, medium, or large soft keyboard. The results not only confirm that keyboard size does not affect data entry rates but that making the keyboard smaller does not increase error rates or negatively impact preference ratings. However, tasks that required users to switch between the alphabetic keyboard and the numeric keyboard do result in significantly slower data entry rates. A model that accurately predicts the time required to enter predefined text is presented, and directions for future research are discussed.     

Investigating touchscreen typing: the effect of keyboard size on typing speed

Two studies investigated the effect keyboard size has on typing speed and error rates for touchscreen keyboards using the lift-off strategy. A cursor appeared when users touched the screen and a key was selected when they lifted their finger from the screen. Four keyboard sizes were investigated ranging from 24.6 cm to 6.8 cm wide. Results indicate that novices can type approximately 10 words per minute (WPM) on the smallest keyboard and 20 WPM on the largest. Experienced users improved to 21 WPM on the smallest keyboard and 32 WPM on the largest. These results indicate that, although slower, small touchscreen keyboards can be used for limited data entry when the presence of a regular keyboard is not practical. Applications include portable pocket-sized or palmtop computers, messaging systems, and personal information resources. Results also suggest the increased importance of experience on these smaller keyboards. Research directions are suggested.     

一种智能化高精度数控直流电源的设计与实现

本论文研究一种以单片机为核心的智能化高精度直流电源。该电源采用数字调节、闭环实时监控、输出精度高，且兼备双重过载保护及报警功能，特别适用于各种有较高精度要求的场合。利用单片机对直流稳压电源进行控制，改善了电源的性能，使用方便灵活，且成本较低，同时控制系统在软件上还可进一步改进，以扩展其功能，而并不需要增加硬件开销，从而提高电源的性能价格比。     

VB实现统计数据的自动录入

以录入土地变更调查汇总数据为例,介绍一种在VB6．0环境下编程模拟计算机键盘操作,从而实现统计数据自动录入的方法。通过该方法不仅可以极大地减免人工录入的工作量,而且可以大大提高数据录入的准确率。     

Keyboard entry

Many recent studies of keyboard entry are summarized with particular emphasis on performance data and fundamental questions about the design of keyboards. The role of auditory and visual feedback and physiological measurements are reviewed. Typical speed and error rates are given for several types of situations and operators. Other methods of data entry are considered, as are source documents, ordering of keys, keyboard interlocks, and chord keyboards. These data should be of interest to anyone concerned with the design and use of keyboards or other data entry devices.     

A display package for CAD of control systems

A multi-access computer system has been installed at the Control Systems Centre of the University of Manchester Institute of Science and Technology. The application of this computer to research into the computer aided design of industrial control systems involved the connection of two keyboard display terminals to the system. The ARDS storage tube displays chosen had the advantages of being teletypewriter compatible and not requiring the connection of a satellite computer A graphics package for the entry and structuring of data derived from the stability analysis of control systems was required as soon as possible after the installation was commissioned. The initial package enabled data to be entered by program and then selected and plotted by keyboard requests. Translation, scaling, alteration of the method of plotting (with points or vectors) and the selection of different items for the display were all carried out by keyboard interaction For long term CAD work a more extensive graphics package was required, the specification was determined following feedback from users of the initial package. It provided additional facilities for graphic interaction, alphanumeric annotation of the displays, specialized drawing and data entry functions and the storing of any pictures built up by the user, as well as a more linked data structure. The structure and facilities of this package are described.     

Evaluation of text input mechanisms for wearable computers

This paper reports on an experiment investigating the functionality and usability of novel input devices on a wearable computer for text entry tasks. Over a 3-week period, 12 subjects used three different input devices to create and save short textual messages. The virtual keyboard, forearm keyboard, and Kordic keypad input devices were assessed for their efficiency and usability in simple text-entry tasks. Results collected included the textual data created by the subjects, the duration of activities, the survey data and observations made by supervisors. The results indicated that the forearm keyboard is the best performer for accurate and efficient text entry while other devices may benefit from more work on designing specialist graphical user interfaces (GUIs) for the wearable computer.