I didn't mean to critique anybody, but just pointed out why a specific solution is not okay for me. Take it as an assessment of the situation to understand what

I didn't mean to critique anybody, but just pointed out why a specific solution is not okay for me. Take it as an assessment of the situation to understand what we have and were we want to go. I might be ignorant about GCM. My understanding is that first you need to register with GCM and have the connection stay online permanent. That requires Google's Apps, which open the system to Google's Access, which clearly is not acceptable. Secondly, Google knows that way always where I am. I do not want a permanent connection to Google servers. Also, how does GCM know where to deliver my messages when it can't know who I'm contacting? I'm not saying that that is an impossible task, but to my knowledge Google isn't reliably (reliable in the sense of keeping my privacy even if Google were to become the attacker) solving it. [0] Each of the three reasons given above are enough to not use GCM. [0] https://developers.google.com/cloud-messaging/gcm https://developers.google.com/cloud-messaging/gcm