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.

You've likely heard of BitTorrent. It's the latest file transfer technology that spreads the load out across a huge network of "peers" and "leechers." But how does it work? Andy and Sean take a look and explain, using raw eggs and protective gear. They also look at some of the legal issues associated with downloading. Contrary to prevailing wisdom, BitTorrent isn't equal to piracy.

Doc leads us through how to create a basic encrypted volume using TrueCrypt on the Mac. An encrypted volume is password protected and holds files, folders, documents and so on that you don't want other people to be able to access.

This week, Cheryl becomes a super spy to demo TrueCrypt. TrueCrypt lets you lock a portion of your hard drive away from prying eyes. You can encrypt a folder, a partition or an entire drive so that it's password protected, secure and safe.