If you are looking for ways to secure your privacy online, you should know by now that the first step is to use encryption for everything. Yet, cryptography is not exactly the most popular or easily digestible of sciences. It could be hard to make sense of all the protocol and algorithm names flying around.
It's generally known email and IM communication can be encrypted when privacy and security are highly necessary. But what about voice? That time when you need to call someone and discuss a sensitive matter. How can you make sure your phone isn't tapped? 10-15 years ago, you would've probably been left with your guard down. Today, not anymore, thanks to ZRTP encryption for voice.