If you’re going to leave your data on the train then this is is the drive enclosure for you.  The Icy Box IB-220RFID is a standard 2.5” SATA external hard drive enclosure with a unique selling point, RFID.  Data is encrypted on the drive and can only be written and read while the RFID token is in close proximity to the enclosure. 

The enclosure has a USB 2.0 interface with an LCD display showing; power, encryption and de-encryption status.  Icy Box include 2 RFID tokens just in case as well as; a Y-power cable (if required), a USB cable, Screwdriver, leatherette pouch, CD and manual. 

If you don’t trust yourself not to lose an RFID token then Icy Box also do the IB-225-STU-FP 2.5” SATA drive enclosure with Finger Print authentication.  I’m hoping you won’t misplace a finger but just in case you do the enclosure can register up to 10 finger prints.

The RFID enclosure is selling for around £22 and the Finger Print version is going for around £32 not including hard drive.