An anonymous reader writes: I used to travel with a book and some clothes in a backpack, and now my entire life fits into my briefcase. I have a laptop, a tablet, and a cell phone with access to all of my documents through Dropbox, and all the books I own are on my kindle. Aside from having about four grand in electronics, the bag has everything of value that I own. If that bag is stolen while I'm traveling, it will be more trouble than if my apartment burns down (while I'm not in it). What can I do to secure my life-in-a-briefcase?