How i can sell a security system that i writed for yahoo messenger?

hello
i have writed an anti keylogger and anti dumper security system. it works on application level(not on system level). so you must install it on the program that need security. thus the security system only protect that program.
it is a new invention!
i want to sell my invention. i haven't registered it. yahoo messenger is a good choice. so yahoo can give the patent.
how i can sell it?
how i can communicate with yahoo masters?
thank you