Your notes are encrypted on this device before they are
sent. The server stores only unreadable text. This passphrase is not your login
password — changing one does not change the other.
Change passphrase
Your recovery code still works after this — it unlocks the
same key by a different route.
This device
Forgetting removes the stored key from this phone, so the
passphrase is asked for again next time. Your notes are untouched — do this if the
phone is lost or you are handing it on.