Privacy is always a core issue to experience design, and identity management is becoming more and more challenging as we interact with more websites and social networks.
This is a cool (though not new) idea: take your identity with you. I might have to try this out. I use a password system to keep track of the hundreds of passwords I use across sites, but this would be much more secure.
Read more:SplashID Key Safe - USB Drive with a built-in Password Manager for Windows & Mac OS