Re: *secure* (non-OTP) pencil and paper systems ?

From: Mike Amling (nospam_at_nospam.com)
Date: 08/01/05 

Date: Mon, 01 Aug 2005 21:53:54 GMT

vedaal wrote:
> are there any (non-OTP) pencil-and-paper systems that are 'secure',

   You could try VMPC shrunken down to a deck or two of playing cards.

>
> or is a computer generated randomness of some sort,
> required to prevent known plaintext attacks?

   You do need randomness for the key, but it doesn't have to be
computer generated. Key management is really a separate issue from
choice of cipher.

--Mike Amling

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