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Re: Black Eye for NSA, NIST, and Denning

To: [email protected]
Subject: Re: Black Eye for NSA, NIST, and Denning
From: "Perry E. Metzger" <[email protected]>
Date: Fri, 03 Jun 1994 08:54:25 -0400
In-Reply-To: Your message of "Fri, 03 Jun 1994 08:01:52 EDT." <[email protected]>
Reply-To: [email protected]
Sender: [email protected]


"Perry E. Metzger" says:
> However, it can be done in advance, and you can conceivably reuse
> forged LEAFs.

I will point out something that I didn't quite understand myself but
have since discussed with Matt Blaze in some detail -- LEAF checksums
are tied to session keys. You CAN do this in advance but only if your
key exchange will permit you to generate your session keys in advance,
too. Obviously, reusing forged LEAFs requrire requires reusing sesison
keys.

Perry

References:
- Re: Black Eye for NSA, NIST, and Denning
  - From: "Perry E. Metzger" <[email protected]>

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