by Peter Gutmann, see: "A Cost Analysis of Windows Vista Content Protection." Peter's substantial contributions to the PKI literature have helped me learn about many of the thorny issues that arise when you actually try to do something with PKI. His writing style is approachable, clear, and sometimes leavened with a little humor.
In this paper, Peter turns his eye towards Vista's content protection technologies, and the costs imposed as a result on hardware developers, driver writers, and of course, eventually, end-users.
Seems to me Vista may be a major step in a downward path taking the PC from general-purpose computing device to set-top box.