[507] in cryptography@c2.net mail archive
RE: Encrypted filing of patents sans GAK?
daemon@ATHENA.MIT.EDU (jamesd@echeque.com)
Sat Apr 5 14:38:34 1997
From: jamesd@echeque.com
Date: Sat, 05 Apr 1997 11:14:36 +0700
To: Larry Layten <larry@ljl.com>, "cryptography@c2.net" <cryptography@c2.net>
At 04:31 AM 2/8/97 -0600, Larry Layten wrote:
> Any well designed system provides for separate keys for encryption
> and signature anyway.
Not so:
You frequently need to link the signature to the encryption key,
because when sending encrypted mail you want to be sure you are
encrypting to the same person who signed.
With separate signing and encryptions keys, you depend on the
key management system to ensure that the two are linked, and the
key management system is the most complex and vulnerable part of
the system.
With a single key, you can reply to a random stranger, and know
that only the intended recipient can interpret it.
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