Hello Simon

On 20-Nov-04, you wrote:

> Hi Andrew,
> Well my explanation was a bit rushed, and not all that
> clear,
> first you will need to know how Matrices Multiply, and
> http://tinyurl.com/6w7yo provides a far better
> explanation than I could.
> You then convert the plain-text into numbers by letter
> A=1, B=2, ... Z=26.
> So "H E L L O" = "8 5 12 12 15", in this case I'm
> currently looking at we are working with 3*3 matrices
> which means nine entries, so taking blocks of 9 letter
> and arranging the corresponding numbers into a 3 by 3
> block.
> Then this matrix is multiplied by a pre-arranged (but
> secret) invertible matrix (ie. det does not equal
> zero), and the resulting matrix is transmitted.
>
> Any clearer?
> Simon

Yes. I shall look at the link now and study it a bit more.


Regards
--

Andrew Bruno
abruno@...