Dead Man’s Switch

A dead man's switch is a mechanism that automatically performs a predetermined action when the operator fails to provide a regular "I'm still here" signal. The term comes from physical controls on trains and machinery that halt operation if the operator becomes incapacitated. In the digital and Bitcoin context, it is software that waits for a periodic check-in and, if that check-in does not arrive within a defined window, executes instructions you set in advance.

Why self-custodians consider one

True self-custody creates a hard problem: if your keys are known only to you, your death or sudden incapacitation can render your Bitcoin permanently inaccessible to your heirs. A dead man's switch is one approach to inheritance and continuity. Configured carefully, it might release recovery instructions to a trusted party, surface the location of a backup, or trigger another safeguard only after you have been unreachable for a meaningful period.

Design cautions

A dead man's switch is only as trustworthy as its design. Too short a timeout risks a false trigger during an ordinary absence such as travel or hospitalization; too long delays legitimate recovery. Any party or service that can be triggered also becomes part of your threat model, since premature disclosure of key material is itself a catastrophic failure. Many sovereign Bitcoiners prefer time-locked or multisignature inheritance schemes that do not require trusting an always-on external trigger.

A dead man's switch touches both inheritance planning and operational security; weigh it against simpler approaches like documented need-to-know recovery instructions.