We can classify the secure waveforms in those developed by large consortiums and details of the waveforms are known by the consortium participants. These waveforms are developed to ensure interoperability between different group of users. A good example of these waveforms are APCO, PMR or TETRA waveforms specifically designed to be used by law-enforcements or public safety agencies around the globe. These radios can be easily configured to use these common waveforms enabling secure communications between these different groups of users. Another example are the waveforms developed by specific armed forces alliances, a good example of it are the SATURN, HAEQUICK, or the ESSOR waveform developed to allow interoperability between the NATO allies. The second group of secure waveforms are those provided by radio manufacturers, or developed by specific armed-forces labs. These waveforms are full proprietary and completely closed, avoiding any possibility to interoperability with other waveforms. The owner of the waveforms have the specifics and required details in order to develop products that are compatible with these waveforms, and it is rarely the case that one of the proprietary waveform is ported from a radio from one manufacturer to a radio from another manufacturer.