Dead man's switch
Leave passwords, instructions or a final message for the people you trust. We check in with you by email. If you stop replying, it's released to them.
- 1Write your message. It's encrypted on this device.
- 2Give your contacts an access code in person. Without it, nobody can read the message, including us.
- 3Check in with one tap when we email you. If you stop, your contacts get the message.
Your message is encrypted on this device. We can never read it.
For the geeks: how secure is it?
Your message is locked with AES-256-GCM encryption on your device. The key is made from two halves: one we keep, and the access code your contacts keep. Neither half can unlock it alone, so we can never read your message, and your contacts can't read it early, because we only release our half if you stop checking in.
Before anything is released you get plenty of warning: an email a week before a check-in is due, the day before, when it's overdue, and a final one halfway through the grace period. A single tap on any of them resets the timer. If our emails ever fail to send, the release waits rather than happening without warning.
1 Confirm your email
We've sent a confirmation link to . Your switch doesn't start until you tap it.
2 Give your contacts this access code
Your contacts will need this code to open your message. We don't keep a copy, so write it down or pass it on now: in person, on paper with your will, or with a one-time link.
If your contacts lose this code, nobody can open the message. That's what keeps it private.
3 Save your management link
Use it any time to check in early, pause, change how often we ask, or delete the switch. Keep it private, like a password.