added brief mention of ZRTP
authorelijah <elijah@riseup.net>
Sun, 27 Apr 2014 23:56:08 +0000 (16:56 -0700)
committerelijah <elijah@riseup.net>
Sun, 27 Apr 2014 23:56:08 +0000 (16:56 -0700)
commit77a507931e97787a57674bdcdfd9ff41c642eeb8
tree5f9daeacd05f7d25fdf410a02340d1f8ca4d51d3
parent1a41ed962eabb47ab90742fcc87aefe45c284094
added brief mention of ZRTP
docs/tech/hard-problems/en.md