Re: 3DES and super-encryption

From: Tom St Denis (tomstdenis_at_yahoo.com)
Date: 02/29/04 

Date: 28 Feb 2004 15:33:52 -0800

Mok-Kong Shen <mok-kong.shen@t-online.de> wrote in message news:<c1qc09$m2v$07$1@news.t-online.com>...
> Mok-Kong Shen wrote:
> >
>
> > Terry Ritter also strongly argues for multiple encryption. See
> >
> > http://www.ciphersbyritter.com/GLOSSARY.HTM
>
> I guess that many think of cascading block ciphers in the
> context of multiple encryption. But it's certainly also o.k.
> to have a cascade consisting of a stream cipher, a block
> cipher and a stream cipher. (Or could there be particular
> disadvantages of that from the security point of view?)

You could argue a disadvantage in terms of security is the added
non-required complexity. That is if you can't prove A is weak then
A+B is weaker than A alone since it raises the question of whether the
combo is weak or not.

< insert mis-understanding by MKS >
< follow-up with clarification >
< MKS then asks about the colour of the sky.... >
< follow-up with stock investment in BFCBs >

....

Tom

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