[737] in cryptography@c2.net mail archive
Securing plaintext following receipt
daemon@ATHENA.MIT.EDU (A. Padgett Peterson P.E. Informati)
Wed May 7 20:13:09 1997
Date: Wed, 7 May 1997 19:50:05 -0400 (EDT)
From: "A. Padgett Peterson P.E. Information Security" <PADGETT@hobbes.orl.mmc.com>
To: cryptography@c2.net
> A better design, I think, would upon receipt re-encrypt each message,
>if local
Have for some time been promoting the concept of three types of encryption:
1) data
2) volume
3) channel
Encrypted E-Mail would be protected by data encryption in transit. Following
receipt, a better method would to be to rely on volume/partition encryption.
In this manner, once authenticated, all of the text would be available allowing
grep, etc.
This method allows using a fast symmetric mechanism for protection of all
data rather than compartmenting each message individually.
Warmly,
Padgett
