Comment Re:64-bit proprietary hashing? (Score 2, Informative) 258
Yup, seems like a garbage idea to me.
http://en.wikipedia.org/wiki/QR_Code
Can hold a a couple of kilobytes and have been around for over a decade and are in use everywhere in Japan.
You can go to a website and create one which contains anything you like, i.e your business card details, in a standard format, a url, telephone number, etc.