Hi, unfortunately, I guess DES is object of US Export regulations, such way there is no legal way to download it. Maybe the study of PGP can help. BTW I have another single-key crypto algorythm which can not be cracked says the theory. On the other hand, there was a brave young man on the list who created another crypto algorythm named 'tea'. It was implemented for PIC. Regards, Imre On Sun, 15 Nov 1998, Wing Kent Kwan wrote: > can you tell me where can I download the ASM source code of PIC > about the DES algorithm program? > >