Possible Duplicate:
How to encrypt an USB stick?
I have a lot of usb's that I frequently carry around with me, and equally frequently lose around me. Since some of the data on them I do not wish to be made public (it is nothing critical - just some personal documents, excel sheets and such that I don't want people to read if I can help it in some way - no direct damage occurs if they do get a hold of them, however, but still...) I was wondering what would be the easiest way to protect them on an usb stick.
I was wishfully thinking - is there some way to encrypt your data on an usb, then when you insert the usb some program asks you for a password, after which all your files seem "normal". If someone else inserts the usb into his/her computer and either does not start the program or enters the wrong password, then all he sees of the contents of the files as gibberish.
Is there such a thing? If not, what would you suggest for something like this?