When you need a quick charge of your phone or other device, it’s easy to just connect it into any old untrusted computer or public charging station. The chance of malicious data getting through to your phone is pretty slim, but it still exists. Over on Node, they show off a way to make sure only power can get through the USB port.
You’ll essentially be disassembling a couple of different USB plugs and then reassembling them together to create a connection that blocks data transfers but allows powering. You’ll need some light soldering skills, but otherwise it’s a simple project to make for yourself. It’s probably not a necessity for most of us, but it’s a fun little thing to make either way.
How to Create a Tiny USB Condom | Node
via Lifehacker
Make Your Own “USB Condom” for Added Security When Charging from Untrusted USB Ports