"the claim that this can work against all Microsoft Wireless Keyboards is 100% BS, and has been since 2007, when the issue was first uncovered; covered in depth by Schneier, and remedied in all versions of the Microsoft Wireless Keyboard created since then, which use at minimum 128-bit AES; NOT XOR."
The only meaningful hits on 'schneier microsoft wireless keyboard' is just a few broken links to a Dreamlab study: http://www.google.com/search?q...,
Those were using a 27 MHz transmitter (near field, i suppose) and an association process that at least uses a different xor key each time. TFA claims that the newer 2.4 GHz keyboards always use the same xor key, 0xCD. TFA mentions at least two recent keyboard models that use this protocol. (Maybe I overlooked other ones)
It seems that there is only the MS "2000 AES for business" keyboard that is explicitly marketed as using AES. http://www.microsoft.com/hardw...