about you · your own details, sealed in your vault
shared only when you share them · a change reaches only the relationships you told to keep current
credentials · facts an issuer attests · sealed in your vault
their door
your door for them
mail · sealed to your relationship's own key
the host stores only ciphertext and cannot read it · it still sees the doors, timing, and size
this door has no mailbox yet
sharing · you decide what crosses
sharing rides this relationship's sealed mail — open the door for mail first