Michael Rogers writes essays on secure messaging, decentralized infrastructure and security design for high-risk users and NGOs.
Commenters link her essay "Please Stop Writing Secure Messaging Tools" and Briar/Bramble vision, and discuss threats from state actors.
The NSA is only one fear - there are other actors you'd expect to be doing similar things. e.g. Chinese, mafia.
Using things like Blackphone can potentially increase the cost of anyone doing this kind of spying, to vastly reduce who will do it for what reasons.
This talk by Dymaxion is good on economics and usability of this stuff: http://dymaxion.org/talks/EaPitLW.html
Can anybody explain the important differences between this and Briar/Bramble[1]?
[1] https://dymaxion.org/essays/briarvision.html previously discussed at https://news.ycombinator.com/item?id=18027949
Just a heads up, the author is a woman. I just pulled up her other essays to read, but here is her bio from this site https://dymaxion.org/me.html.
https://dymaxion.org/essays/pleasestop.html