FW: FW: Cable Modem IP and MAC Address -- are they "sensitive"?

["Wijnen, Bert (Bert)" <bwijnen@lucent.com>]

Anotehr response from a security expert

Thanks,
Bert 

-----Original Message-----
From: Steven M. Bellovin [mailto:smb@research.att.com]
Sent: maandag 28 oktober 2002 16:14
To: Wijnen, Bert (Bert)
Cc: Uri Blumenthal (E-mail); Jeff Schiller (E-mail); Eric Rescorla
(E-mail)
Subject: Re: FW: Cable Modem IP and MAC Address -- are they "sensitive"?



In message <A451D5E6F15FD211BABC0008C7FAD7BC0F38017B@nl0006exch003u.nl.lucent.c
om>, "Wijnen, Bert (Bert)" writes:
>Any advise from the security specialists?
>
>Thanks,
>Bert 
>
>-----Original Message-----
>From: Woundy, Richard [mailto:RWoundy@broadband.att.com]
>Sent: zaterdag 26 oktober 2002 3:05
>To: 'mibs@ops.ietf.org'
>Subject: Cable Modem IP and MAC Address -- are they "sensitive"?
>
>
>Folks,
>
>Forgive a possibly stupid question.
>
>Is the pairing of an IP address with a MAC address for a residential cable
>modem in a MIB table automatically considered "sensitive information" in the
>context of <http://www.ops.ietf.org/security.html>?
>
>This question is in respect to cable modem-specific MIBs.
>
>-- Rich Woundy, AT&T Broadband
>
>
Under certain circumstances, such as v6 privacy-enhanced addresses
or cable IPSs that change their users' IP addreses, yes, it is.  It 
allows a time-invariant linkage between different IP addresses used by 
one person.

		--Steve Bellovin, http://www.research.att.com/~smb (me)
		http://www.wilyhacker.com ("Firewalls" book)