1992-10-13 - Mr. Squirrel

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From: Eric Hughes <hughes@soda.berkeley.edu>
To: cypherpunks@toad.com
Message Hash: 4449d8423a3d4ccea75be61a5bd0f1ff0f12e8a37191013726ee2d9bfc0c5fb6
Message ID: <9210131856.AA29470@soda.berkeley.edu>
Reply To: <9210131710.AA20497@bsu-cs.bsu.edu>
UTC Datetime: 1992-10-13 18:49:36 UTC
Raw Date: Tue, 13 Oct 92 11:49:36 PDT

Raw message

From: Eric Hughes <hughes@soda.berkeley.edu>
Date: Tue, 13 Oct 92 11:49:36 PDT
To: cypherpunks@toad.com
Subject: Mr. Squirrel
In-Reply-To: <9210131710.AA20497@bsu-cs.bsu.edu>
Message-ID: <9210131856.AA29470@soda.berkeley.edu>
MIME-Version: 1.0
Content-Type: text/plain

A signature on a message is dependent on the contents of the message;
it is not a free floating bit of information.  You can't copy a
signature, therefore, without copying the message or find another
message that hashes to the same value.  This is the design criterion
behind one-way functions--that you can't (feasibly) find a message
that hashes to a given value.