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1995-01-12 - Re: Multiple symetric cyphers

Header Data

From: eric@remailer.net (Eric Hughes)
To: cypherpunks@toad.com
Message Hash: 9da5ec2995744adb78ca1664200bebb87c7741c70dc52211b65837c1f5ea3673
Message ID: <199501121632.IAA00887@largo.remailer.net>
Reply To: <199501121547.AA02187@poboy.b17c.ingr.com>
UTC Datetime: 1995-01-12 16:33:46 UTC
Raw Date: Thu, 12 Jan 95 08:33:46 PST

Raw message

From: eric@remailer.net (Eric Hughes)
Date: Thu, 12 Jan 95 08:33:46 PST
To: cypherpunks@toad.com
Subject: Re: Multiple symetric cyphers
In-Reply-To: <199501121547.AA02187@poboy.b17c.ingr.com>
Message-ID: <199501121632.IAA00887@largo.remailer.net>
MIME-Version: 1.0
Content-Type: text/plain


   From: paul@poboy.b17c.ingr.com (Paul Robichaux)

   Must I
   require the user to tell that program what cypher was used to encrypt
   the file she wishes to decrypt?

Only if you don't want to store the type alongside.  See below.

   Is storing the cypher type as part of the encrypted file a weakness?

Well, it's no weaker than current systems.  PGP stores the cipher type
in the source code: it's always IDEA.  One should allow, however, the
cipher type to be empty alongside the data so that another tool can
store cipher information.

Eric

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