You sign up for a site and they generate you a unique user ID to use. One way to do this in PHP is to use the uniqid () function. This with generate a 13 or 23 character unique ID, which you can then add a prefix to if you desire. Once you send this to the user, you can then encrypt and store it in the database.

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MD5: is an algorithm that is used to verify data integrity through the creation of a 128-bit message digest from data input (which may be a message of any length) that is claimed to be as unique to that specific data as a fingerprint is to the specific individual.

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All users of information resources are responsible for assisting in the protection of the systems they use. Many intruders enter systems simply by guessing passwords and even the best passwords can eventually be defeated mathematically, given enough time. The use of strong passwords acts as a firm deterrent against password guessing attacks, and buys additional time against other attacks.

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Software Engineering processes are composed of many activities, notably the following. They are considered sequential steps in the Waterfall process, but other processes may rearrange or combine them in different ways. Generally, there are 7 steps to follow:

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CAPTCHA is an acronym for "Completely Automated Public Turing Test to Tell Computers and Humans Apart". As the name suggests, it's a test to distinguish the degree of being human. In this post, I will share a simple technique to create CAPTCHA which I used in some of my first PHP projects.  

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