As a customer, I would like to use a zero knowledge application for note taking. I don’t want my notes leaked due to security breaches. I also don’t want them t

As a customer, I would like to use a zero knowledge application for note taking. I don’t want my notes leaked due to security breaches. I also don’t want them to used for other purposes such as data for machine learning without my permission. My notes should always be encrypted and I am the only who has the key. You may want to take a look at Bitwarden to see how they do it. It is open source. You can use the similar architecture for client side encryption and decryption, and extend it to note taking.