20. User Authentication and Encryption
Invariably in a web environment, the need will arise to restrict access to an area of a website. Almost hand-in-hand, you will need to secure data either to store in a database or to transfer between di...
20.1. Generating Random Passwords
Sometimes security dictates that users may not be allowed to choose their own passwords. In these cases you need some way to quickly generate them. Even if you do not have a requirement for random passwords, you w...
20.2. Using Encryption to Protect Data
Protecting data is important in this day and age. Stories regularly appear in the news of companies having their machines broken into and having data stolen. Ensuring that any sensitive data that is kept is a...
20.3. Simple CAPTCHA for Real User Detection
CAPTCHA is an acronym that stands for Completely Automated Public Turing test to tell Computers and Humans Apart. Essentially it is a broad term that means anything that can be used as a test to ensure ...
20.4. Authenticating Users
Often, web areas are secured using server-based authentication methods, either with .htaccess files or through the server configuration file. Unfortunately, this type of authentication is useful only for general access c...
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