Cryptopuck: The insides
Cryptopuck is a hand-held devicethat will encrypt whatever drive gets attached to it. Currently, the encryption is performed on a Raspberry Pi Zero, but the software should work on any Linux system that can run Python. The device enables its users to encrypt their removable media on the fly, simply by plugging them into Cryptopuck.
Repository: https://github.com/platisd/cryptopuck