I turned a USB stick into my personal security toolkit — and it cost nothing

You may assume a USB stick is merely for storage, but it can be more than that. You can turn it into a portable security environment that’s totally under your control. It can be a device you plug into a computer without fear or worry about what already lurks inside the PC. So I created a self-contained toolkit on a USB stick. It’s encrypted, silent, and powerful enough to analyze or clean any system it goes into.