PoisonTap Physical Hacking Device
With a $5 Raspbery Pi Zero and a USB cable, your web identity can be compromised and a remote attacker can browse sites as you.
Some diabolically clever code and a deep understanding of networking has gone into Sammy Kamkar’s PoisonTap, further cementing the importance of physical security and HTTPS web-wide.
Check out Sammy’s thorough writeup of the PoisonTap’s exploits (and its source code) in his blog post.