Change PGP Key Expiration Date

• Boot into Tails with Persistent Storage unlocked

• Open Terminal

• Set KEYID to full fingerprint of primary

  KEYID="E3F7F5F76640299C5507FBAA49B9FD3BB4422EBB"
  

• Set new expire date on primary key

  gpg --quick-set-expire $KEYID 2025-01-01
  

• Set new expire date on all subkeys

  gpg --quick-set-expire $KEYID 2025-01-01 '*'
  

  Note: if you're letting one or more subkeys expire, instead of '*' specify the full fingerprint of each subkey whose expiration date you DO want to change.

• Export PUBLIC key again.

  • wherever/however you exported the key when creating it

  • secret keys do not change, so they don't need to be backed up again