Sarcophagus is a blockchain-enabled, general-purpose digital dead man’s switch. It is autonomous, censorship-resistant, and immutable. They rely on modern smart contracting networks like Ethereum as well as Arweave’s permanent file storage network; files you place in a sarcophagus are only unlocked in the event of you failing to attest to the contract.  Example use cases of how Sarcophagus can be used include: (1.) Will and trust; (2.) Password Recovery; (3.) Credential Passdown; (3.) Political Activism/Whistleblowing; (4.) Password or Key Material Backup; and (5.) Emergency Communications.