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Key Points

Key Takeaways

  • 1

    The Final Commit

  • 2

    GitHub Successor: Can designate a person to inherit repository management rights after death. Setting to prevent your accumulated code assets (grass) from disappearing.

  • 3

    1Password Emergency Kit: Prepare a 'Physical Paper' that allows family members who don't know the master password to access the Vault in an emergency.

  • 4

    Google Inactive Account: 'Dead Man Switch' that allows you to choose whether to give Gmail access rights to a specific person or delete the account entirely if there is no access for 3 months.

  • 5

    Crypto Clean: If no one knows the location of the private key, that asset is lost forever. Establish inheritance method for hardware wallet (YubiKey/Ledger).

Introduction: Only Ghosts Know Passwords

In 2026, we have become a generation with more digital mementos than physical ones. However, legal systems have not caught up. When you die suddenly, your family cannot open your MacBook, AWS charges do not stop, and they don’t know password for bank account (net bank).

This is “Harassment to remaining family”. As a responsible engineer, let’s design the process of system termination (Graceful Shutdown).

1. The Key to the Kingdom: 1Password

All account information is here. However, master password exists only in your head.

Emergency Kit

1Password has an “Emergency Kit” that can be output as PDF. This includes sign-in address, email address, Secret Key, and Master Password (handwritten field).

  1. Print this.
  2. Write password by hand.
  3. Put in envelope and seal.
  4. Keep with registered seal or passbook and tell partner the location.

2. GitHub Successor

For engineers, GitHub is portfolio itself. You can designate a successor from settings screen (Settings > Account > Successor settings).

  • Deceased User Policy: By officially submitting death certificate, designated user can inherit management rights of Public/Private repositories.
  • Why it matters: Prevent OSS projects you maintain from being Abandoned with your death.

3. Protocol: Dead Man Switch

You can set a trigger “If I haven’t logged in for 3 months”.

Google Inactive Account Manager

  • Trigger: Inactive period of 3 months to 18 months.
  • Action:
  • Warn person himself at specified contact frequency (SMS/Email).
  • If no reaction, send “Access right to data” to specified person (partner etc.).
  • Or, delete account completely.

If there is “Data you don’t want to be seen”, setting automatic deletion is kindness (or self-defense).

4. Hardware Token: YubiKey

Wall of Two-Factor Authentication (2FA) is too high for family. Because Authenticator app on smartphone is needed.

If you register physical key like YubiKey and keep it with Emergency Kit, they can break through without knowing smartphone unlock code.

Search

YubiKey 5C NFC

Since it supports NFC, verification is possible just by holding over iPhone. Keeping spare key in safe also serves as risk hedge when you lose smartphone yourself.

Amazon

Conclusion: Last Kindness

Thinking about death is thinking about living. Organizing digital legacy clarifies “What is important to me and what is garbage”.

May your code continue to be useful to someone even after your death. Prepare for exit(0).

# legacy # security # github # 1password # google # 2026