Thanks Timothy. Yes, now that I know that it works I'll clean it up to allow more flexibility and to provide detailed documentation. It definitely needs to allow for both single and double length keys. Even though, I'm pretty sure that this assembler routine will only ever be called by the specific PL/I module that I've written, and that module provides a service to the application programs to allow them to validate or query an item of data. The validation is easy as the response is just YES or NO, whereas the query function returns the data item to the application program, hence the need for encryption. All the same, this needs to be run past the security people here to make sure that they approve the use of this technique.
Regards, John. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
