Seminar On PHP And Web Security System

Web security can be roughly divided into three parts. First, how are objects and resources named securely? Second, how can secure, authenticated connections be established? Third, what happens when a Web site sends a client a piece of executable code? After looking at some threats, we will examine all these issues.

One reads about Web site security problems in the newspaper almost weekly.The situation is really pretty grim. Let us look at a few examples of what has already happened. First, the home page of numerous organizations has been attacked and replaced by a new home page of the crackers’ choosing. (The popular press calls people who break into computers ‘‘hackers,’’ but many programmers reserve that term for great programmers. We prefer to call these people ‘‘crackers.’’) Sites that have been cracked include Yahoo, the U.S. Army, the CIA,NASA, and the New York Times. In most cases, the crackers just put up some funny text and the sites were repaired within a few hours.Now let us look at some much more serious cases. Numerous sites have been brought down by denial-of-service attacks, in which the cracker floods the site with traffic, rendering it unable to respond to legitimate queries. Often the attack is mounted from a large number of machines that the cracker has already broken into (DDoS atacks). These attacks are so common that they do not even make the news any more, but they can cost the attacked site thousands of dollars in lost business.In 1999, a Swedish cracker broke into Microsoft’s Hotmail Web site and created a mirror site that allowed anyone to type in the name of a Hotmail user and then read all of the person’s current and archived e-mail.

Security is a measurement, not a characteristic.It’s is also an growing problem that requires an continually evolving solution.A good measure of secure application is it’s ability to predict and prevent future security problems, before someone devises an exploit.As far as application design goes, security must be considered at all times (initial spec, implementation, testing and even maintenance)

>A very popular language for web application development 

>Easy to learn and adopt. Popular among new learners 

>Almost all PHP programs are written for the web 

>During development most of us forget one important aspect and that is the security of the application 

>Always have a tendency of “do it later”. As a result high possibility of security holes in the system. 

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