Re: *secure* (non-OTP) pencil and paper systems ?
From: Mike Amling (nospam_at_nospam.com)
Date: Mon, 01 Aug 2005 21:53:54 GMT
> 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.