SNOW

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ICE stands for Information Concealment Engine. It is a 64-bit block cipher, with key size any multiple of 64 bits. snow exploits the steganographic nature of whitespace. Locating trailing whitespace in text is like finding a polar bear in a snowstorm (which, by the way, explains the logo). And it uses the ICE encryption algorithm, so the name is thematically consistent.

This web page contains a snow-concealed message, encrypted using password "ice". If you download the HTML source for this page, and save it to a file snow.html, you can extract the secret message using: snow -C -p ice snow.html

Local links:

Web/CGI snow encryption/decryption for web pages
Applet - digitially signed so it can read/write local files (signature notes)
manual page

Check out the SNOW homepage at http://www.darkside.com.au/snow/