Thanks a ton for implementing and sharing this great feature 
A few questions if you don't mind:
- Are images and other resources in the note encrypted as well?
- As of now the plugin cannot be found on my Joplin MacOS Desktop 3.4.12, is this expected? I will retry in a few hours.
- Do you plan to add the ability to edit an encrypted note on the fly, without having to ever decrypt it first? If I have to decrypt the note everytime I want to edit it, the unencrypted version might leak at some point in the note versions, the daily builtin backup, my (Time Machine) continous external backup, etc, not very safe.
For the record this feature was in high demand: