A proper law

[David_Biggins@usermgmt.com]

> -----Original Message-----
> From: Philip Perry [mailto:philip.f.perry@btopenworld.com]
> Sent: 05 March 2003 18:10
> To: ukcrypto@chiark.greenend.org.uk
> Subject: Re: A proper law
> 
> 
> Any repeating algorithm can, eventually, be defeated.  

Eventually.  That can be a far longer time than is reasonable in a criminal
case.

> Either 
> by brute force
> (esp. quantum computing techniques), 

Which do not yet exist.

> by anticipating user 
> dullness (e.g.
> encrypting compressed files which have known headers, trailers, and
> checksums), 

Which fail to protect against a competent opponent.

> or by human intelligence (e.g. spies).

The best bet.

> One pass pads, especially if combined with stenanography, is much more
> difficult.

As well as being impractical on any large scale.

Dave.