Yesterday I wrote an article highlighting how to use attr_encrypter and it was for this app. I made a video so not much text is needed. But this highlights using encryption, UUIDs with ActiceRecord, AJAX calls to a Rails controller, and some jQuery magic. You can access the application at http://vcloudairvms.cfapps.io/
Watch the video for instructions and all the goodness. And of course here is the repo with all the code => https://github.com/kacole2/vcloudairvms
hooray rails!