This is a great use of local Java, I’m glad it is the as not yet cracked AES as well. Though the second we get quantum computers AES is going down, I tell you. Going down.

I don’t think I can really find a valid use for this on any of my blogs but it’s a nice encryption system running without an accessable public key. The problem is telling the other party your shared password of course, which is why secure key distrubution is so damned hard.

I turned to Javascript, as it is ubiquitous and it would allow me to do client side decryption. I found this site that uses Javascript to do 256-bit AES encryption and decryption. This encryption was more than enough for my purposes.

I then modded the code to do dynamic text with CSS. The result is the little demo at the top. When you enter the key into the prompt box, it decrypts the scrambled text on the fly without reloading the page! Better yet, it’s all done locally, so not even the server ever sees the plain text.

For the code to use the javascript encryption follow the link.

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