Public Key Destruction
In many cases, cryptographic keys remain valuable long after they leave service. An attacker might record all the ciphertext encrypted under a key and hold it for a long period. If the key becomes available later, all the saved ciphertext can be decrypted easily. Here are some suggestions for destroying keys when they [...]
Directed Attack over the Network
After more than a decade of computer viruses, PC users are beginning to appreciate the dangers of loading new software on their machines. A computer connected to a network, however, is subject to additional forms of attack, based on content and automatically installed software rather than user-installed software.
The implementation of the API for Windows is such that messages are sent between the plug-in application and Skype by using the Win32 SendMessage() function. This standard mechanism for communication under the Windows operating system can be difficult to implement if you are not used to low-level Win32 communications.
Being a successful data warehouse project manager means that you have to do more — much more — than simply create project plans and ask team members to turn in weekly status reports.
Tell It Like It Is
It doesn’t matter whether you’re working with users, executive sponsors, consultants, vendors, team members, or anyone else. The most [...]
Without standards and protocols, a juggernaut like PKI would become unmanageable. For a real-life example, look at the U.S. railroad system in its earlier days. Different railroad companies were using different size rails, and different widths between the rails. This made it impossible for a train to make it cross-country, and in some cases, across [...]
The obvious way to tell that your data warehousing project is in trouble is when you don’t have anything to show for your efforts and you thought that you would. You should try to get some indication that trouble is brewing, however, before you reach that point.
Movements of nodes in a mobile ad hoc network cause the nodes to move in and out of range from one another. As a result, there is a continuous making and breaking of links in the network, causing the network connectivity (topology) to vary dynamically with time. Since the network relies on multihop transmissions for [...]
Security with file servers usually consists of user identification procedures provided by password access to individual servers and individual file protection by user authorization for each file. These provisions can prevent accidental access but become inadequate to protect against willful unauthorized access or harm.
Advantages of File Servers
File servers provide a number of advantages over individual [...]
Remote Procedure Calls
All useful programs use subroutines to accomplish their function. The invocation of a subroutine is called a function call. It is obvious in languages such as C when subroutines are used. It is not so obvious that all languages, even the most advanced 4GL, use function calls extensively.
RPC provides the capability for any [...]
UNIX file servers are platforms dedicated to providing disk access for the network. UNIX networks provide access through a number of systems, variously called network file system (NFS) or remote file system (RFS).
NFS, the more comprehensive, providing the means not only to support file servers but to make all files on all UNIX platforms in [...]
Java was designed with security in mind from its first implementation. The reason behind this was the potential insecurities that were introduced by applets. However, the designers of the language, having targeted Java at the Internet, realised that much stronger facilities than those associated with applets were needed in the language. As a consequence some [...]
Email Surveys Simple text-based email surveys
Implementing a simple email survey requires little technological expertise, and can be done with minimal software requirements. In its simplest form an email survey can consist in simply sending an email containing text questions in the body, and asking participants to hit the ‘Reply’ button on their mailer, fill in [...]
Enabling the Web server to deliver dynamic content. The Apache Web server can be configured to handle a number of these so-called dynamic page technologies, including PHP and JSP.
Loading and storing any programs (or scripts) which need to be executed when a Web page is processed. Typically these programs are associated with Web forms and [...]
The aim of this post is to describe an example Web server. The one which I shall describe is Apache. This is certainly the most popular Web server being used on the Internet at the time of writing.
There are a number of reasons why Apache is popular. The main one is that it is free. [...]
programming, html, software, web design, domain, hosting
One of the best-known enterprise frameworks is the J2EE (Java 2 Enterprise Edition) framework.
Java Database Connectivity (JDBC)
The JDBC API contains facilities whereby a relational database can be written to and read from. It allows the programmer to:
connect up to a database on a local or remote computer;
send programming statements in a language known as SQL [...]
When the owner of a Web site wishes to advertise that site with a search engine they will access a registration page at the search engine site. This page will usually contain a form which asks for details of the site such as its home page, the name and e-mail address of the person submitting [...]
In 2000, Microsoft announced what is probably its largest software development programme. It was known as .Net and involved configuring many of its products such as Excel, Word, MS Access together with its supported programming languages such as Visual Basic and C++ so that they are seamlessly integrated with the Internet and with each other.
There are a number of ways in which companies can make money from the Internet. Probably the best known way of making money is by selling some commodity; this could be a non-IT commodity such as a CD or item of clothing or it could be some piece of application software, a font, a browser [...]
As the reader may have discovered by now, when the ‘Send data‘ button is clicked, no testing occurs to ensure that form elements have been filled in, checked, or selected; it is quite easy for participants to supply no information at all and just submit an empty form. Happily, it is possible to use JavaScript [...]
