Hi !

Ariel Barreiro wrote:
>
> Hello everybody!
>
>         I know there are some application of DES (Data Encryption Standard) wi
th
> some PIC's. I need any DES appilcation with any pic you have.

There is an DES app. note on Microchip's WEB server, but you don't get
the code outside the USA and Canada due to export law.

Sombody mentioned on this list DES is implemented on the PIC cards for
descrambling european pay-tv chanels. I still haven't found the right
code
snipet but

http://www.cs.auc.dk/~rja/techuk.htm

seems to be a good starting point. After reading the FAQ i am not sure
if
it is real DES or a simlified variant without the S-boxes. If you find
the right subroutine in the descrambler binaries, please let me know ...

> BTW, If you
> have other Encryption algorythm applied in any PIC, please see if you can
> help me with that.
>

There are implementations of the Tiny Encription Algorithm on the WEB on
:

http://vader.brad.ac.uk/tea/tea.shtml

I have also implemented the encryption part of the RC5 algorithm and can
send it to
you via priv. e-mail.

St.