The Benefactor downloads the html file from
github. Use Legacy's offline encryption protocol to create a
key pair and encrypt your seed phrase.
The Benefactor gives the Beneficiary Key to the
Beneficiary to keep safe.
The Benefactor Key and the Encrypted Seed Phrase are
packed into a Deadman Switch whereby, upon the death of
the Benefactor, an email is sent to the Beneficiary
containing the Benefactor key and the Encrypted Seed
Phrase.
Finally, the Beneficiary enters both keys into the
Legacy decrypt data fields and the seed phrase will be
decrypted and ready to recover the Bitcoin.