Network communication is susceptible to eavesdropping and packet sniffing software looking for sensitive information. Free, secure chat applications help reduce the risk of losing business-critical data and help protect the privacy of your employees. Trillian Instant Messenger ( http://www.ceruleanstudios.com/) is a messaging platform built over many popular instant messaging clients like AIM, Yahoo! and ICQ. Employees working from home or remotely should always be using Virtual Private Network (VPN) software to connect to workplace computers and networks. Server software can be used to filter the type of traffic that passes in and out of your network.”]
Source: https://www.cuinfosecurity.com/how-to-ensure-safe-messaging-a-702