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RE: [LinkSec] perfect forward security




It seems to me that you want to prevent theft of services (e.g., after
an off-line attack, future subscription videos can be stolen).

Billing ability may also require it to prevent one customer from, after
an off-line attack, being able to rack up charges on another customer's
account.

Peter

-----Original Message-----
From: Russ Housley [mailto:housley@vigilsec.com] 
Sent: Friday, March 28, 2003 8:23 AM
To: stds-802-linksec@ieee.org
Subject: Re: [LinkSec] Teleconf notes 3/25/03


I could not attend the teleconference, but I would like to respond to
this 
question raised in the notes.

>PFS = perfect forward security.  Is it needed?

I think that this is not a requirement.  I do not think that we need the

computational burden.

Is anyone advocating it?

Russ