Re: CypherPunks: Efficient Hardware DES.

[John A. Limpert <johnl@Radix.Net>]

Brendan Simon wrote:
> The above is a direct extract from the book.  The book is printed in
> 1996.  I was just wondering if anyone new how the reduction of 16 cycles
> to 4 cycles work.  Is it a manipulation of the algorithm or some kind of
> pipelining trick ?

I don't see why it couldn't be done in one cycle if you are willing to
throw transistors at it. Just think of it as unrolling a loop.