Hi Rohan, As much as I come up with "some kind of solution", I am not across all areas to choose the best. E.g. The key infrastructure is a problem, and I am not fully aware what is considered "best available solution" today. The problem, at the time of writing, is: 1. Most of our communication is not encrypted end-to-end. 2. The metadata for phone communication is easily available. We have at least the following questions: 1. How do you encrypt safely all communication from phone to phone? I believe, the only way of doing it these days is by using IP telephony (and messaging etc.) because I can encrypt it. It needs to be an open source solution because it is the only way to find backdoors etc. Security by closed source is an oxymoron because I rely on good faith that the solution provider is trustworthy. 2. To avoid metadata tracking, she communication has to be broken up so the path between sender and recipient is not visible. The Tor network is a working example. 3. The entry point of this network is critical. It knows the sender and the recipient. The security fails if this system is tainted. So, hardening of this system is essential. Furthermore, I have to trust these entry-points so a web of trust helps me to find trustworthy systems. I am able to find a handful of bits and pieces to build these kind of systems. But it maybe needs a bit more knowledge than just mine. So, that's why I asked whether someone else here is interested in it and like to share ideas. I still believe that it will be possible to track some targeted communication. But it may stop mass surveillance, spying on everyone as we have it in place now. Regards Peter