There is definitely more to encryption than one algorithm.  AFAIK, most
banks are using triple DES at the moment.  RSA is a popular algorithm, but
there are a few problems with it (for you): 1) you must be able to pick
large primes, which means you need to know fermat's little theorem as well
as having some sort of large integer class, 2) you must be able to pick
and encryption exponent appropriately, which is more computation.  You can
search for RSA online, and you'll find some reasonable explanations.
DES employs left-right shifts, and an arbitrarily chosen function and
key.  It's tough to explain, but there are a lot of places online that
have good explanations.  Again, there's a problem that you need a large
integer class.  

Good luck.

--Brannon Smith

On Sat, 23 Mar 2002, [iso-8859-1] davie elliott wrote:

> I was wondering if I could get a little information
> please.
> 
> I have to do a huge program at the end of my course
> and I was thinking about making a bank program. I
> would like to make it as realistic as possible, so I
> have had a look at some encryption algorithms.
> However, one of my lecturers has told me that there is
> more to encrytion than just one algorithm. I was
> wondering if anyone can give me a few sites or point
> me in the right direction so that I can reaserch into
> encrytpion deeper.
> 
> Thank you
> 
> P.S. someone posted a couple of sites a while back on
> cryptography, but I had to format before I got chance
> to view them. I would e greatful if that person could
> repost them.
> 
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