Martin Sauter for WirelessMoves has written a brief article highlighting the risks of using unsecured VoIP services on public WiFi hotspots.

He points out that quite often, by default, your communications over a public WiFi hotspot are not encrypted and that goes for the voice stream too which could be passively lifted from the airwaves and replayed.

What do you talk about on your Voice over IP calls and would you be concerned if a third party knew?