Accessing SmartWare-encrypted drive extracted from My Book External

The data is encrypted by the circuit board where the USB port broke. You can try having the port soldered back on or find a replacement board on ebay. This explains a bit about the boards  http://community.wd.com/t5/Off-Topic-Discussions/Bridge-Boards/td-p/353839 Or there is this 

https://wdc.custhelp.com/app/answers/detail/a_id/70/session/L3RpbWUvMTM5MDMyNjIwNS9zaWQvZVBrTU9YS2w%3D

Joe