[kyboren]

That definitely fits with the 'hacker ethos' and all, but why not just use a smartcard with a Class III reader (i.e. dedicated pinpad and display on the reader itself).

Support is already integrated with GnuPG, they are specifically designed to prevent key material leaking, and they have some other nice properties (like self-destruction after three incorrect admin PIN attempts).

Smartcards are cheap, anyway: http://shop.kernelconcepts.de/product_info.php?cPath=1_26&pr...

[bigiain]

Mostly because I've got a pair of RspberryPis – and I'm doing this mostly out of curiosity and learning (and a little bit of "sticking it to 'the man'"…).