Has anyone actually done this? I lack the skill to but for a piece of software this important, surely someone is working on this? And will it be repeated for ev

Has anyone actually done this? I lack the skill to but for a piece of software this important, surely someone is working on this? And will it be repeated for every update? Personally if I was the NSA or GCHQ I think it would be a wicked smart plan to release this and have it be actually secure, have it audited, gain trust, let people use it for a while then after a while release an update that shoved all the messages in memory to a server somewhere once people let their guard down. Implausible yes, but that's the issue with trust. And I'm not sure releasing the clean source would really help this. The only thing would be to hold up on updating the app until a trusted party had audited the updated binary. More paranoia: Also would have to audit the specific binary for every country with wierd laws (e.g. UK's RIPA) appstore to make sure we didn't get a nice local flavour of poison.