Re: Double Encryption Illegal?

"Douglas A. Gwyn" wrote:
>
> PRdO wrote:
> > IMHO double encryption *does not* add security, i.e., double
> > encryption in 128-bit doesn't equal better encryption.
> > (since encryption uses random keys, "randoming" again the data
> > would not lead to more secure data).
>
> Wrong. If different keys are used for the two encryptions, the
> result is usually harder for an eavesdropper to crack than if
> just one of the two encryptions had been used. There is no
> randomness involved in either encryption.

He said that applying Ceaser cipher twice does not enhance security. He was correct in that statement.

--
   If children don't know why their grandparents did what they 
did, shall those children know what is worth preserving and what 
should change? 

   http://www.cryptography.org/getpgp.htm