DRM for Coffee Makers? This is madness. Anything. But. This.

It'll be hacked, everything always is.

In the end, I'll prefer something like http://www.home-barista.com/brewing/cory-dcu-dcl-coffee-brew... Coffee before DRM. :)

Better solution: tiny RFID tags with a unique ID and public-key authentication. Impossible to fake and dead cheap to implement.