Encrypting files on a dongle (freeware)

[zoidberg]

I'm after a piece of software that will password encrypt files on my dongle. Got quite a bit of stuff on there (it's a 1GB) and if I lost it I wouldn't want anyone to get at the files.

Anyone know any (preferably) freeware that can do such a thing?

Ta.

[JonRB]

www.truecrypt.org