I have written a plain text to base64 encoder here : <a href="http://www.getbitcoin.info/assets/misc/base64generator.html" rel="nofollow">http://www.getbitcoin.info/assets/misc/base64generator.html</a><p>Soo.. instead of sharing keys, you can just share keywords and then generate the keys from the keywords. It's just javascript that I based on another base64 encoding example. Feel free to use as long as I get a credit somewhere.