https://theintercept.com/2016/07/02/security-tips-every-signal-user-should-know/
Pinboard (datasociety) 11/13/2016
https://datasociety.slack.com/files/jticona/F32UPBWK0/pasted_image_at_2016_11_14_11_06_am.png|Pasted
Pinboard (datasociety) 11/14/2016