You mixed some straw-man objections ("Facebook is evil") with one that's important and legitimate. People are right to be cautious with closed source crypto. I

You mixed some straw-man objections ("Facebook is evil") with one that's important and legitimate. People are right to be cautious with closed source crypto. It has a long and sordid history of turning out to be snake oil, terribly implemented, or outright backdoored. Given the people involved, though, and all the scrutiny the Axolotl protocol has already withstood, WhatsApp looks trustworthy. It would be better if the source code were available for inspection, and even better if it had a deterministic build so that people vould verify that what's installed on their phone was actually built from that code. Rolling out usable end-to-end encryption to a billion people is still a huge achievement and we owe Moxie, Trevor Perrin, and the whole WhatsApp and Open Whisper Systems teams our thanks.