Hello Erik,

Take a look at http://www.geocities.com/SiliconValley/2499/code.html
TEA  algorithm code there works at 6K bytes/sec @ 20 Mhz and takes 40
bytes.

Bye,
 Nikolai

On Wednesday, January 26, 2000 Erik Reikes wrote:
> Does anyone know of private key encryption that would be suitable for use
> in a PIC uC for encrypting small byte stream messages?

> It doesn't have to withstand detailed cryptanalysis, but the harder to
> break, the better.  I had initially thought of just having a rotating 16
> bit key that is xored with each byte.  This seems like it might be pretty
> easy to crack though.  I really have no experience with this sort of thing.

> We're not transmitting credit card numbers or anything, we just want to
> obscure our underlying protocol for marketing purposes.

> Any pointers?

> Erik Reikes
> Software Engineer
> Xsilogy, Inc.

> ereikes@xsilogy.com
> ph : (858) 535-5113
> fax : (858) 535-5163
> cell : (858) 663-1206