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Re: [caops-wg] Name Constraints - attempt at framing issues

Bob

the issue is about global naming. You used a globally unique email address in the certificate when you posed the question, so I said yes. If on the other hand you had just put Brett in the cert then of course I would not expect this to always name the same person.

regards

David

Cowles, Robert D. wrote:
There are lots of people named David ... should they
all be the same person? Maybe they *should*, but
that doesn't make it so. As a relying party, without
a MUST and a reasonable way to implement it with
good controls, I won't count on it. I'm a bit leery
that the CA can ever perform the simpler job, but I can
mitigate that risk by making the users register and
if they want to use a new certificate they have to
register the new one and say it replaces or is to be used as a synonym the old one .... not that I *automatically* the two certificates belong to the
same EE.

BC


-----Original Message-----
From: David Chadwick [mailto:d.w.chadwick@kent.ac.uk] Sent: Friday, October 14, 2005 7:22 AM
To: Cowles, Robert D.
Cc: Von Welch; CAOPS-WG
Subject: Re: [caops-wg] Name Constraints - attempt at framing issues



Cowles, Robert D. wrote:





I really have trouble believing that anyone would believe

that brett or even brett@isp.net if identified by a certificate

from CA1 would have any relationship to the same name appearing 
in acertificate from CA2.


Dear Bob

I am one of those who think they should refer to the same entity.

David

 (In the case of the "email-like" address




it depends on (1) the security of the email system ... for instance

mindspring doesn't have a secure IMAP or POP option so I've just

been sitting thru a conference where a few people's passwords are

broadcast on the wireless network in clear text every 10-15 minutes

... (2) the policy of the isp about reuse of ids ... if the user 
with the email name brett leaves, can I have that id now?



Bob






--

*****************************************************************
David W. Chadwick, BSc PhD
Professor of Information Systems Security
The Computing Laboratory, University of Kent, Canterbury, CT2 7NF
Tel: +44 1227 82 3221
Fax +44 1227 762 811
Mobile: +44 77 96 44 7184
Email: D.W.Chadwick@kent.ac.uk
Home Page: http://www.cs.kent.ac.uk/people/staff/dwc8/index.html
Research Web site: http://sec.cs.kent.ac.uk
Entrust key validation string: MLJ9-DU5T-HV8J
PGP Key ID is 0xBC238DE5

*****************************************************************









--

*****************************************************************
David W. Chadwick, BSc PhD
Professor of Information Systems Security
The Computing Laboratory, University of Kent, Canterbury, CT2 7NF
Tel: +44 1227 82 3221
Fax +44 1227 762 811
Mobile: +44 77 96 44 7184
Email: D.W.Chadwick@kent.ac.uk
Home Page: http://www.cs.kent.ac.uk/people/staff/dwc8/index.html
Research Web site: http://sec.cs.kent.ac.uk
Entrust key validation string: MLJ9-DU5T-HV8J
PGP Key ID is 0xBC238DE5

*****************************************************************