1 · The account, on this computer
Open Vigia for the first time and it asks for two things: your name, and a password of twelve characters or more — three or four words you will remember are easier to type and harder to guess than one clever word. Press the button and Vigia makes your key: an encrypted Ed25519 pair whose private half is sealed under that password and under this computer, in a folder of its own. There is no form on lockflare.com, no email, no card, and nothing is sent anywhere — which is why it works with the network cable unplugged.
Then Touch ID or Windows Hello, once. That is the whole door, and the same door every time Vigia opens: the password, then the sensor. A Mac with no sensor, or a laptop with its lid closed, falls back to the password and says so on screen. Five wrong passwords and the account stops answering for fifteen minutes.
One computer, one account: from then on the door asks that password and nothing else.
