What you have there is snake-oil. The script you point to translates the page to Base64 encoding. Base64 is not encryption, no matter what people tell you. Base64 is useful for taking binary data and transfering it via plain ASCII (such as for e-mail attachments). 'Encryption' means that the process is (in theory) not reversable without the associated key. Base64 has no key.

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated