CCTalk program needed. Source provided, needs more features

I'm looking for someone to modify C program. The program opens Com port (defined in config file) and initialize cctalk device (bill validator), then listen and wait for note to be processed. When note is processed it sends a request to IP (defined in config file). All this function fine, with unencrypted cctalk and 16 bit crc. Minor bugs: the program used to hang and it was fixed with small delay added for the commands sent to the device. This fix works on one PC with on Bill Validator and doesn't on different system with different bill validator :) Encryption support - that's what has to be added, so the program can work with devices that don't support unencrypted cctalk. In general that's all, I need the program more stable and to support encryption. At least for now that will be enough.