August 2000
Intermediate to advanced
800 pages
13h 15m
English
Content preview from Core PHP Programming: Using PHP to Build Dynamic Web SitesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Encryption
Encryption is the process of transforming information to and from an unreadable format. Some algorithms simply scramble text; others allow for reversing the process. PHP offers a wrapper to C's crypt function, plus an extension that wraps the mcrypt library.
The mcrypt functions rely on a library of the same name written by Nikos Mavroyanopoulos, which provides an advanced system for encrypting data. The URI for the project is <ftp: //argeas.cs-net.gr/pub/unix/mcrypt/>. Sascha Schumann added mycrypt functionality to PHP.
Cryptography is a topic beyond the scope of this text. Some concepts discussed in this section require familiarity with advanced cryptographic theories. A great place to start learning about cryptography is the FAQ ...
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