TrilogyEC Professional Edition was developed by Trilogy Solutions, Inc ( TSI ) as an absolutely FREE encrypted chat, instant messaging (IM) and file transferring application. TrilogyEC utilizes 256 bit Advanced Encryption Standard ( AES ) cryptography to deliver U.S. military grade security in an instant messenger / chat hybrid program. With the TrilogyEC, you can chat with up to 5 people simultaneously in a completely secure environment without the need (or risk) of public servers.