-----Original Message----- From: Valdis.Kletnieks@vt.edu [mailto:Valdis.Kletnieks@vt.edu] <Snip - good points all>

Most of those concerns are in fact mitigated by a well implemented Privacy implementation

Which is why I started off by mentioning RFC4191. ;) -----End Original Message----- And Vista/Win7/etc. make it even more interesting by not doing EUI64 at all. ... Hopefully they have more entropic 'random' values as well ... /TJ