Computer Systems Technology IOS110 Lecture Notes - Crypt (Unix), Sha-1, Query String
3 Oct 2012
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Document Summary
With passing data through php, storing it in databases it is crucially important to protect this information and one of the ways is to encrypt the data. Encrypting is done to protect information such as usernames, passwords, credit card numbers and even messages. Php provides various ways to protect information by the use of cryptography, form handling and use of crypt() function. Cryptographic methods used are md5, blowfish, sha1 and des. There are many methods to encryption which can be grouped in one-way and two-way encryption methods. The crypt() function is a one-way method to encrypt as once you encrypt the plain text it is not possible to get this back. This is benefit of crypt() as if information was stolen it would be difficult and nearly impossible to decrypt back to plain text. Passing credentials through php is important when accessing web pages.
