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International Journal of Electronics and Information Engineering 2018年第1期8卷 32-39页

作者： Zhengjun Cao Lihua Liu Yang Li

Fully homomorphic encryption (FHE) allows anyone to perform computations on encrypted data, despite not having the secret decryption key. Since the Gentry's work in 2009, FHE has become a hot topic. In this paper, we would like to stress that any computations performed on encrypted data are constrained intrinsically to the underlying domain (finite fields or rings). This restriction makes the primitive useless for the computations involving common arithmetic expressions and relational expressions, because of the incompatibility of numerical computation with underlying encoding transformation over finite domains. We want to reaffirm that cryptography uses modular arithmetic a lot in order to obscure and dissipate redundancies in plaintext, not to perform any numerical calculations. Thus FHE will be of little importance to client-server computing or cloud computing.

关键词： client-server computing Common Arithmetic Encryption Domain Fully Homomorphic Encryption Modular Arithmetic

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Gesture-based animated CAPTCHA

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INFORMATION AND COMPUTER SECURITY 2016年第3期24卷 242-254页

作者： Shumilov, Artem Philippovich, Andrey Moscow State Engn Univ Res & Educ Ctr Infocognit Technol Moscow Russia

Purpose - This paper aims to describe the development of a new experimental CAPTCHA (completely automated public turing test to tell computers and humans apart), which is supposed to provide better protection against spam bots compared to the existing captcha solutions. Design/methodology/approach - In the new CAPTCHA, the authors are using animated images of hand gestures to represent letters and numbers. A lot of people use sign language as their primary means of communication, but an automatic algorithm able to reliably recognize such gestures from videos without any additional data has yet to be developed. Findings - The experiment showed that at first, it takes time for people who do not use sign languages in their everyday lives to adapt to the new CAPTCHA, but after several successful recognitions, they have no more trouble with it than with a typical captcha implementation. Originality/value - The paper shows that people with little to no knowledge of sign languages can still recognize gestures on video relatively fast. Therefore, a gesture-based implementation can be used not only on websites aimed at sign language speakers but also as a general-purpose captcha service.

关键词： Innovation Computer security Access control client-server computing

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Design of an Integrated Project Management Information System for Large Scale Public Projects: Iranian Case Study

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JOURNAL OF INFORMATION TECHNOLOGY RESEARCH 2011年第3期4卷 14-28页

作者： Taghavi, Mona Patel, Ahmed Taghavi, Hamed Univ Kebangsaan Malaysia Management Informat Syst & Network Secur Bangi Malaysia Univ Kebangsaan Malaysia Bangi Malaysia Kingston Univ Kingston Upon Thames Surrey England Iranian Strateg Informat Solut Co ISISCO Tehran Iran

Due to the unprecedented growth of outsourcing ICT projects by the Iranian government, a critical need exists for the proper execution and monitoring of these projects. In this paper, the authors propose a web-based project management system to improve the efficiency and effectiveness of the management processes and accelerate decision making. Based on the requirements and information flow between various units involved in the complete life-cycle of ICT project management, a functional model and system architecture with various underlying structures has been designed. The functional model contains two sub-systems: process management and information service. The proposed system structure is based on a four-layer client-server computing model. As a part of a publically available ICT system, it must be secure against cybercrime activities. This system can bring efficiency in managing the projects, improve decision making, and increase the overall management process with total accounting and management transparency. The proposed system overcomes the problems associated with a central system and traditional management processes, as is currently the case in Iran.

关键词： Business Management client-server computing Government Projects ICT Project Management Information System Privacy Security Web-Based Management System

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Active Directory Domain Services 2008: How-To 1

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2009年

作者： John Policelli

ISBN: (纸本)9780672330452

Active Directory Domain Services 2008 How-To Real Solutions for Active Directory 2008 Administrators John Policelli Need fast, reliable, easy-to-implement solutions for Microsoft Active Directory 2008? This book delivers exactly what youre looking for. Youll find nearly 250 tested, step-by-step procedures for planning, installing, customizing, and managing Active Directory Domain Services (AD DS) in any production environment. Completely up-to-date, it fully reflects the brand new version of Active Directory introduced in Windows server 2008, which contains the most significant changes since AD was first introduced. When time is of the essence, turn here first: get answers you can trustand useright now! Fast, Accurate, and Easy-to-Use! Prepare for Active Directory Domain Services installation Install and uninstall Active Directory Domain Services Manage trust relationships and functional levels Manage Operations Master Roles and Global Catalog servers Efficiently administer sites and replication Manage the Active Domain Services schema Administer Active Directory DS data Make the most of Active Directory Group Policies Manage password replication policies Implement fine-grained password and account lockout policies Safely back up and recover Active Directory DS Use Active Directorys improved auditing capabilities to track changes more effectively John Policelli has been honored by Microsoft as a Microsoft MVP for Directory Services. A solutions-focused IT consultant with over a decade of success in architecture, security, IT strategy, and disaster recovery, John has designed and implemented dozens of complex directory service, e-Messaging, web, networking, and security enterprise solutions. He has provided thought leadership for some of Canadas largest Active Directory installations. He has also served as an author, technical reviewer, and subject matter expert for more than 50 training, exam writing, press, and whitepaper projects related to Windows server 2008 Ide

关键词： Enterprise Networks Windows/Windows 95 98 client-server computing

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Pro SQL server Disaster Recovery 1st ed.

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丛书名： Expert's voice in SQL server

2008年

作者： James Luetkehoelter

ISBN: (数字)9781430206019

ISBN: (纸本)9781590599679

Many would argue that the single, most important job of a SQL server database administrator is to be able to recover your database in the event of loss or damage. Pro SQL server Disaster Recovery helps you meet that goal by showing you how to think about and plan for potential problems. Youll learn to anticipate and reduce the likelihood of a disaster, and to mitigate the effects of a disaster when one does occur. Perhaps most importantly, youll learn how to prepare so that you can return a system to its normal state quickly, ensuring system availability and the continued success and operation of your business. Many SQL server features and technologies are, or can be put to good use in disaster recovery planning. In this book, youll learn about powerful tools and features such as Database Snapshots and Mirroring for data backup and disaster recovery that are present in SQL server 2005, and that are enhanced in SQL server 2008. Also covered are common issues to expect when using these features. This book explores your options by examining the technical details of disaster recovery features and then applying that knowledge to practical scenarios. Theres a human side to disaster recovery planning as well. Like few other activities, disaster recovery planning requires that you work closely with a wide variety of people from all across your organization. People skills are as critical to disaster recovery planning as technical skills, and perhaps more so. This book does not leave you in the dark, but provides sound advice on how to keep disaster recovery planning projects on track, how to avoid dangerous scope creep, and how to work effectively with the variety of personality types that you will encounter. Disaster recovery planning is really about sleep. When you get the call at 3:00 am that your database is lost, dont wake up with that icy feeling in your veins. Instead wake up with confidence that you have a plan in place, a plan that youve practiced, that management h

关键词： Database Administration Management client-server computing

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Pro SQL server 2008 XML 1st ed.

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丛书名： The expert's voice in SQL server

2008年

作者： Michael Coles

ISBN: (数字)9781430206309

ISBN: (纸本)9781590599839

Knowledge and ability to apply XML are de rigueur in todays world, and SQL server developers and administrators are no exception to that rule. Pro SQL server 2008 XML is your key to unlocking the powerful XML feature set first introduced in SQL server 2005 and since refined in SQL server 2008. Author Michael Coles shows how to store XML using SQL servers builtin XML data type. Learn to query and manipulate XML data using standard technologies such as XQuery and XSLT. No SQL server database professional can afford to be without knowledge of the XML feature set. Pro SQL server 2008 XML delivers on the knowledge that you need to remain competitive in your career. Shows how to store, query, and manipulate XML documents in SQL server Provides stepbystep examples showing best practices and advanced features Accurately discusses how SQL servers XML feature set stacks up against the ISO XML standards What youll learn Store XML documents using SQL servers builtin XML data type. Query those stored documents using SQL/XML and XQuery. Manipulate and transform XML using XSLT and XPath. Understand how SQL servers XML support compares to the ISO XML standards. Create SOAP endpoints for use in web services applications. Create primary and secondary XML indexes to improve performance of XML queries. Who is this book for? SQL server SQL/TSQL developers and .NET developers who want to take advantage of the specific serverside XML functionality available in SQL server 2008 About the Apress Pro Series The Apress Pro series books are practical, professional tutorials to keep you on and moving up the professional ladder. You have gotten the job, now you need to hone your skills in these tough competitive times. The Apress Pro series expands your skills and expertise in exactly the areas you need. Master the content of a Pro book, and you will always be able to get the job done in a professional development project. Written by experts in their field, Pro series books from Apress give you t

关键词： SQL server Network Programming XML SGML Other Document Mark-up Languages Web Programming client-server computing

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SQL in a Nutshell 3rd ed

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丛书名： In a Nutshell

2008年

作者： Kevin Kline Daniel Kline Brand Hunt

ISBN: (纸本)9780596518844

SQL in a Nutshell applies the classic O'Reilly "Nutshell" format to Structured Query Language (SQL), the elegant descriptive language that's used to create and manipulate stores of data. This book explains the purpose and proper syntax of hundreds of SQL statements, as defined in four major SQL implementations, and details each entry with explanatory text and illustrative examples. Perhaps best of all, authors Kevin and Daniel Kline feature MySQL in their coverage, and give it billing that's equal to that of Oracle, Microsoft SQL server, and PostgreSQL. Their inclusion of open-source MySQL, which in most situations carries no license fee, is recognition of its growing popularity and suitability for serious database applications; also, it improves this book's appeal to Unix and Linux developers. The majority of this slender book comprises eminently useful syntax documentation (which is in the style of Unix man pages, with bracketed options and monospace arguments) and the other information that's specific to individual statements and functions. Additionally, it includes a relatively small amount of conceptual information, such as a section on the proper use of NULL values. The material that's not statement-specific also contrasts data-type implementations of the four covered platforms--for example, readers learn that a PostgreSQL int2 value is known as a smallint in ANSI standard SQL. This is a particularly handy reference book, if you use one of the emphasized SQL implementations. --David Wall Topics covered: Structured Query Language (SQL), as implemented in Oracle, Microsoft SQL server, MySQL, and PostgreSQL, as well as in ANSI standard SQL (SQL92 and SQL99). After an introduction to data types and relational database fundamentals (the latter is not emphasized), the authors document SQL statements and functions, one by one and alphabetically. They take care to point out differences among the four implementations.

关键词： SQL client-server computing

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Microsoft Office Project server 2007 Unleashed

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2007年

作者： QuantumPM SAMS

ISBN: (纸本)9780672329210

Microsoft Office Project server 2007 Unleashed provides a comprehensive and in-depth overview of Microsoft Office Project server 2007 and Enterprise Project Management (EPM). This book should be used as a reference to guide you through system capabilities and the use of more advanced product features in the context of your business processes. In this book you will find cutting-edge information, including the necessary framework and approach to implement a complex project management software product. Find practical, real-world guidance on how to plan, install, configure, deploy, use, manage, and customize your EPM Implementation. This book is your only in-depth source for Microsoft Office Project server 2007!

关键词： Computers amp the Internet client-server computing

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*** 1

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2007年

作者： Andrew Edney and Rui Maximo

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*** 1

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丛书名： Expert's Voice

2007年

作者： Michael Coles

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