http://isdb4l77sjqoy2qq7ipum6x3at6hyn3jmxfx4zdhc72ufbmuq4ilwkqd.onion/docs/guide/making-connections.html
. ** Connection security code is the cryptographic hash (SHA256) of combined public keys of both sides — there are 2 256 possible security codes (1 with 77 zeros – about 1000 times smaller than the estimated number of atoms in the visible universe). Conversation preferences Tap on one of your conversations to open conversation preferences. Here you can choose whether you wish to allow disappearing messages, deleting messages for everyone and voice messages.