Currently on a flight ORD-SAN. Fired up Zoom to check in with my wife about the condition of my mother. Was told by FA that using FaceTime, Skye, and Zoom was prohibited due to security reasons. She could not find anything written in the American Way or the Gogo about prohibited use of these services. Given the date, I left it go. There are other communication services, Facebook and email that where ok with this FA. Anyone else having had this happen?