[Swordmaker]

Apple FaceTime and iMessaging rated as the most secure mass-marketed messaging service by Electronic Freedom Foundation (EFF). . . there are more secure, non-mass-market messaging apps by their criteria, but Apple's are tops in the commercial range.— PING!

Check out the list on the EFF site and find a messaging app that suits you. Either Mac or Windows.

Apple Messaging Security Ping!

If you want on or off the Mac Ping List, Freepmail me.

[Mark17]

I use face time quite a bit. I don’t know about all this technical stuff you are talking about, but of all the different systems I have used, face time and Viber were the easiest to use. I don’t know how secure Viber is, but I like it too.