let someone scan this in person. it works once, then a new one appears. nobody can message you without one.
pasted codes work, but only scanning in person proves nobody is in the middle.
your contacts in this browser are sealed with your passphrase.
asked every time this tab opens, and after 15 minutes away. a copy of this browser is useless without it. there's no recovery: forget it and the only way back is wiping.
a spot is the open chat for a place: a party, a venue, a building. everyone there shows up with a picture, anyone can talk, and you choose who can DM you.
your picture and status are only shown inside spots, encrypted with the spot's key. you get a different identity in every spot. pictures are redrawn at 96×96, so no location or camera details are ever sent.
put this at the door. the fingerprint proves it's the real one: copycats can use the name, never the fingerprint.