I will make some in depth articles about how voice encryption really works in government environments.
The open standards and open source still have to reach the military and government environments for what’s related to secure speech.
To give you an idea of the complexity and kind of particular issues that exists, look at the USA 3G Wireless Security: A Government Perspective and the A Waveform Architecture to Support Security and Interoperability in Multi-National Wireless Networks for Tactical Communication .
They are using so-custom protocols like Secure Communications Interoperability Protocol that require the use of patented MELPe ultra-narrowband codec that there’s not a real market of application and equipment using this. Only a small elite of government controlled companies from few countries manage this de-facto lobby.
Should we change this bringing open standards also to government sectors?