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Building a Defensive Perimeter Against Malicious User InputA Word About Secure Database Access
Unfortunately, this database access code exhibits insecurities of its own. For example, you should never use the sa account (or an equivalent) to access databases from Web applications. Instead, use weak accounts that lack permission to drop tables, insert, update, and delete records, and the like. In addition, you should use stored procedures or parameterized commands in lieu of dynamic SQL commands for added protection against malicious input parameters. Finally, consider encrypting database connection strings to minimize the risk of information disclosure if your source code falls into the wrong hands. And note that truly paranoid ASP.NET programmers encrypt connection strings and store them in ACLed registry keys. When it comes to Web security, a little paranoia can be a good thing.
Don't bother looking for syntax errors: functionally, this page is just fine. Type your name into the input field and click the "Click Me" button, and a personalized greeting appears on the page. But security-wise, this page is a disaster-despite the fact that it's similar to countless sample pages found in books, magazine articles, and even the .NET Framework SDK.
Give yourself a pat on the back if you spotted the following flaws:
• The page neither constrains nor validates user input
• It echoes raw, unfiltered user input to the page
Download pdf Building a Defensive Perimeter Against Malicious User InputAn Introduction to the Java Programming LanguageIn 1991, a group of Sun Microsystems engineers led by James Gosling decided to develop a language for consumer devices (cable boxes, etc.). They wanted the language to be small and use efficient code since these devices do not have powerful CPUs. They also wanted the language to be hardware independent since different manufacturers would use different CPUs. The project was code-named Green.
These conditions led them to decide to compile the code to an intermediate machine-like code for an imaginary CPU called a virtual machine. (Actually, there is a real CPU that implements this virtual CPU now.) This intermediate code (called bytecode) is completely hardware independent. Programs are run by an interpreter that converts the bytecode to the appropriate native machine code. Thus, once the interpreter has been ported to a computer, it can run any bytecoded program.
Sun uses UNIX for their computers, so the developers based their new language on C++. They picked C++ and not C because they wanted the language to be object-oriented. The original name of the language was Oak. However, they soon discovered that there was already a programming language called Oak, so they changed the name to Java.
The Green project had a lot of trouble getting others interested in Java for smart devices. It was not until they decided to shift gears and market Java as a language for web applications that interest in Java took off. Many of the advantages that Java has for smart devices are even bigger advantages on the web.
Currently,Create Your Own Search Engine with PHP and Google Web ServicesThe buzz about Web Services gets louder every day. Is it the promise of perfect interoperability, lower costs, and increased efficiency? In this article, an effort has taken to show you how to create your own "Google search engine" with Web Services provided by Google. First, you need to create a Google account here (all you need is an email address). In order to invoke the Web Services we also need the toolkit. In this article we will use PHP NuSoap classes; free download here.
I strongly recommend seeing the FAQ page to know all about Google’s cutting edge technology available to the public. If you are interested in the advanced theory of the search engine, see this publication from Stanford University
Google has made only three methods available in their Web API. You will see soon that it ’s just more than enough to build powerful applications.
Here is what they look like:
doGoogleSearch() – search for specified term in the Google database.
doGetCachedPage() – retrieve a page cache from the Google cache.
doSpellingSuggestion() – retrieve a spelling suggestion from Google.
The above methods exposed by the Google’s Web Services make it possible to use number of very cool features – Web search, cached document retrieval, phrase correction – in a simple but extensible manner, which opens up very interesting new possibilities for Web developers. Pic. 1 shows how a client program invokes a method from Google’s Web Services. Let’s rock and roll.
Download pdf Create Your Own Search Engine with PHP and Google Web ServicesHacking the XBOX 360 for Noobs TutorialA guide for flashing your drive firmware to read backup games. 2007 Edition. The Xbox 360 DVD-ROM drive firmware hack is currently the only modification or hack available for the Xbox 360 that allows you to play properly created backup copies of Xbox 360 games. The firmware hack does NOT allow homebrew programs to run and does NOT bypass region protection. If a video game is locked to a particular region, then it will only play on an Xbox 360 of that same region. Before jumping into this modification, it is a good idea to learn how this hack works. In the most basic form, an Xbox 360’s game protection comes from two security measures.
First of which is encryption. Nearly all files on an Xbox 360 game disc as well as the Xbox 360 hard drive are signed with Microsoft’s private key. If anything in these files, even just a single bit, is changed, the signature is broken and the Xbox 360 refuses to run the file. The second security measure is media locking. The default.xex (game executable) is restricted to run only from a certain type of media. For example, all Xbox 360 games are restricted to run only from “Xbox 360” media. Before the firmware hacks, if you were to copy an Xbox 360 game and try running it from “DVD+R DL” the Xbox 360 would obviously see that it wasn’t “Xbox 360” media and refuse to run it because of the media restriction.
Textbook’s Xbox 360 Firmware TutorialWorldMate® Professional Edition 2006 for Blackberry ManualWorldMate® Professional Edition 2006 for Blackberry. Manual. Learn more about each of the features by clicking on one of the links below:. Screen Navigation..
Download PDFIntroduction to Microsoft Access Tutorial pdfThe purpose of these tutorials is not to teach you Microsoft Access, but rather to teach you some generic information systems concepts and skills using Access. Of course, as a side effect, you will learn a great deal about the software enough to write your own useful applications. However, keep in mind that Access is an enormously complex, nearly- industrial-strength software development environ- ment. The material here only scrapes the surface of Access development and database programming.
1.1 Introduction: What is Access? Microsoft Access is a relational database manage- ment system (DBMS). At the most basic level, a DBMS is a program that facilitates the storage and retrieval of structured information on a computer’s hard drive. Examples of well-know industrial-strength relational DBMSes include
• Oracle
• Microsoft SQL Server
• IBM DB2
• Informix
Well-know PC-based (“desktop”) relational DBMSes include
• Microsoft Access
• Microsoft FoxPro
• Borland dBase
1.1.1 The many faces of Access Microsoft generally likes to incorporate as many fea- tures as possible into its products. For example, the Access package contains the following elements: • a relational database system that supports two industry standard query languages: Structured Query Language (SQL) and Query By Example (QBE);
Download Introduction to Microsoft Access Tutorial pdfATEN UC-1284 Printer Cable User ManualATEN UC-1284 Printer Cable is a bridge that links the traditional IEEE 1284 parallel interface to the Universal Serial Bus(USB) interface. It is easy to install and compatible with most printers from major manufacturers. The UC-1284 is Bus powered and does not need an external power. The enclosed CD-ROM contains the following files: - Read.me - UC-1284.SYS - UC-1284MN.DLL - UC-1284.INF - UC-1284CI.DLL - ADBOXSUP .EXE - UCREMOVE.INF - UCREMOVE.EXE INTRODUCTION PRODUCT FEATURES AND SPECIFICATIONS TROUBLE SHOOTING PREVENTING RADIO AND TV INTERFERENCE FEATURES
• Full compliance with the USB spec. 1.0. • Low power consumption and is powered from USB connection. • Full compatible USB host device drivers available. • Transparent fully automatic support for true bi-directional communication. • Hardware initiates and manages automatic negotiation for the fastest protocol available. • Supports standard PC parallel port register-based operation. • Support of multiple logical channels. • Maximum throughput: 1.216 Mbytes/s (ECP mode). • Allows current Microsoft Windows printer drivers to print seamlessly to USB. • Fully Plug & Play compatible.
Download pdf ATEN UC-1284 Printer Cable User ManualSemantic Web Use Cases and Case StudiesPresenting compelling search results depends critically on understanding what is there to be presented on the first place. Given that the current generation of search engines have a very limited understanding of the query entered by the user, the content returned as a result and the relationship of the two, the opportunities for customizing search results have been limited.
Opening up search
The majority of Web pages today are generated from databases, and Web site owners increasingly are providing APIs to this data or embedding information inside their HTML pages with microformats, eRDF, or RDFa. In other cases, structured data can be extracted with relative ease from Web pages that follow atemplate using XSLT stylesheets.
SearchMonkey reuses structured data to improve search result display with benefits to both search users, developers, and publishers of web content. The first type of applications are focusing on remaking the abstracts on the search result page: Figure 1 shows the kind of presentations that structured data enables in this space. Based on data, the image representing the object can be easily singled out. One can also easily select the most important attributes of the object to be shown in a table format. Similarly for links: the data tells which links represent important actions the user can take (e.g. play the video, buy the product) and these links can be arranged in a way that their function is clear. In essence, knowledge of the data and its semantics enables to present the page in a much moreExperience in integrating Java with C# and .NETJava has been with us for seven years now and has made phenomenal inroads into the world of system, business, internet and educational programming. As demonstrated by presentations made at conferences such as JavaGrande, its influence extends also into scientific and high performance computing, specifically in parallel and distributed applications [11]. The reason for Java being used by these latter communities is that it has something to offer over and above the languages currently in use – chiefly Fortran, Visual Basic and C/C++.
Specifically, object-oriented programming, increased security both within a program and between programs, parallelism facilities, applets and access to new resources through class libraries are cited as features which could be profitably used by scientific programmers [19].
The move towards Java in distributed computing has not been without its problems [17, 15], however, and it is to be expected that programmers will be loathe to embark upon another change of language so soon. Yet, the advent of Microsoft’s new language C# cannot go unnoticed, and the questions to be asked are:
• What are the additional advantages of C# as a language over Java?
• Can the new and interesting features of C# be incorporated into existing Java software?
Like Java, C# is not just a programming language, but co-exists with a particular runtime enironment (like Java’s JVM), a means of communicating on the network (like Java’s RMI but unlike Java’s applets) and several independent technologies which are used by both languages (such as XML)
The purpose of this paper is to present experienceThinkPad 570E Supplement to Users Manuals pdfThis supplement presents additions and updates to the information in the user’s reference and the preloaded online book. Use this information instead of the corresponding section in both of the user’s manuals. “Important safety instructions” on page 2 Presents the safety information. “Information to be added to the user’s reference” on page 4 Presents the information unique to the ThinkPad 570E. “Updates to the user’s reference” on page 7 Presents the updated information of the user’s reference. “Installing the operating systems” on page 10 Includes the following additions and updates to the online book.
Additional information: – “Installing Windows 98 Second Edition” on page 11 Your ThinkPad 570E computer supports Windows 98 Second Edition. If you install Windows 98 Second Edition, refer to this section. Note: Windows 98 is preloaded when you purchase the computer. To install the support software, use the procedure give in the online book for Windows 98. Updated information: – “Installing Windows 98” on page 12 – “Installing Windows 95” on page 15
Download ThinkPad 570E Supplement to Users Manuals pdf
