The home page title has the word zero knowledge, I guess?
Their GitHub has slightly more info regarding this, but I agree that stuff like this should have at least a page dedicated for it that explains how they've implemented their security.
> Notesnook is a free (as in speech) & open-source note-taking app focused on user privacy & ease of use. To ensure zero knowledge principles, Notesnook encrypts everything on your device using XChaCha20-Poly1305 & Argon2.
Wireguard also uses ChaCha20-Poly1305, but I am not sure it's relevant? I believe that attack is specific to SSH:
"The attack exploits weaknesses in the specification of SSH paired with widespread algorithms, namely ChaCha20-Poly1305 and CBC-EtM, to remove an arbitrary number of protected messages at the beginning of the secure channel, thus breaking integrity."
Their GitHub has slightly more info regarding this, but I agree that stuff like this should have at least a page dedicated for it that explains how they've implemented their security.
> Notesnook is a free (as in speech) & open-source note-taking app focused on user privacy & ease of use. To ensure zero knowledge principles, Notesnook encrypts everything on your device using XChaCha20-Poly1305 & Argon2.
https://github.com/streetwriters/notesnook