developerWorks: PHP Encryption for the Common Man

[ Thanks to An Anonymous Reader for this link. ]

Consider how today's world differs from the world of just 20 years ago. Long ago, in the 1980s, encryption was spy stuff--something you read about in a techno-thriller by Tom Clancy. If somebody wanted to keep a bit of information private, he encrypted the data with a password, a pass phrase, or another basic method.

"Fast-forward to today and encryption is everywhere. Passwords are stored encrypted in databases. Encrypted tunnels through cyberspace are possible via SSL, SSH, and other technologies--not to mention virtual private networks. Everyday people can and do use Pretty Good Privacy (PGP) to armor their sensitive files and e-mail..."

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