If you have a

USB drive

you can carry quite a bit of information around on it. Documents, passwords, bookmarks, and more. If you have something like

PortableApps

installed on it you could have even more information. It might be wise to

encrypt your USB drive

just in case you lose it.

Is there anything on your hard drive or USB key you'd rather no one knew about? Perhaps important business documents, sensitive presentations or your resume. Perhaps private photos or movies or, you know, other stuff. Sean and Andy take a look at the open source TrueCrypt software, explain what it does, and show how (and why) to use it.