Alberto Escudero-Pascual <[EMAIL PROTECTED]> writes: > As part of the IMEI the first two digits include the country of approval > (33 for France for example) or the manufacturer.
Aha, that's bad. This 33 looks a lot like France's prefix, so I suppose US has 1, Luxembourg has 352. The question is: is the IMEI length variable? Adding new countries or manufacturers will exceed the IMEI one day? It's certainly not desirable to have this exceed the Interface ID derived from IMEIs. > I will like to see alternatives that protect possible personal > identifiable information. Let's come up with a first derivation that gives a fixed-length Interface ID from IMEI and then randomize it for those who desire privacy, what do you think? > A message digest of the (IMEI, Nonce) will theoretically make use of > all parts of space and will provide unlinkability between IPv6 > global addresses and certain devices, what imho is highly > recommendable. I think that what you propose does not give privacy. The hash you propose will stay un-changed and someone can identify that the same person that bought a CD yesterday, bought an MD today. So what. What do you think? Alex -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
