Protect your pages with login using PHP sessions.Add a small piece of code to the pages you want to protect with login. Learn how to use PHP sessions to preserve login status using hard coded password check.

SSL is an internet security protocol. When a web server sends out content through HTTPS, this one gets encrypted so that only the client making the request can read it.

In this tutorial you will be tought in a fast and easy way how you can generate a random password. Random passwords could be handy when you want to set up a members system where users get a random password mailed to there email-adress. It's not hard to understand, everyone can use this.

Learn how to super protect your files without the use of mySQL. This tutorial will help you learn how to password protect your file quickly and easily in a few lines of code.

In general, there are two ways of detecting malicious activity. The first is to manually look at how your site is being used, what input is being given etc. The second is to have your program analyse user input for common types of attack, then inform you of any problems. This tutorial focuses on the second option.

This article will guide you through writing secure PHP code and covers many of the common security pitfalls one will encounter while making php applications. Covers things such as register globals, SQL injection, include files, and demonstrates how to protect against those kind of attacks. Anyone new to PHP, and even some more experianced people, should read this before deploying thier application.

This article demostrates an easy way to maintain sessions and security (or authorization) in PHP. It does NOT use the PHP built in session support. The following method will allow you to easily secure any PHP page by simply including a file at the top of every page. In this tutorial you will: a) Create your database structure; b) Create a login page; c) Create your security check include file; d) Secure your site. Update: I fixed a couple of bugs in the article. Thanks for the feedback Update to the update: I have fixed the article text to include the code that was missing due to the previous update.

Nice little function that will generate a completely random password.

The concept of a "honey pot" is a very popular and interesting topic in computer security. Gives some information on how you can use PHP to setup these hacker traps.

Tutorial covering the basics of encryption and how to apply it to user validation, including a sample script to try out.

This tutorial will show you things to be aware of when coding PHP, so that your code is more secure, and less hackable.

This article explains how to stop those Website download leach programs from downloading your content using PHP.

Protect your PHP Scripts using the most efficient method: HTTP Authorization, as implemented in PHP. Using this tutorial, you'll learn how easy it is.

This tutorial explains how to safely hide away PDF files from public access using htaccess, but then having a PHP file run its own authorization to allow access to the file without the Network Password dialog box. The PDF file will be displayed in the browser (if the user has acrobat reader) or promoted to download the pdf file if the user doesn't have acrobat reader. This is perfect for when you want to restrict PDF files to authorized eyes only. This simple to use tutorial will have you up and running in a few minutes, one page of info with full source code, and working examples.

This article describes the why and how of real-life data encryption, covering PGP and GnuPG, and using PHP and the mcrypt and mhash libraries.