Cryptographic coin flipping, now in Keybase

Keybase can also do randomized shuffles:

18 participants were online in my team’s chat. Keybase’s servers see there’s a flip of some kind happening, and who the participants are. If you’re excluded as a participant despite being online, AND if you don’t trust ANYONE ELSE on the flip, then maybe there’s something fishy going on there.

Source: keybase.io