You’re right. “Securing” is bad word. “Obfuscating” might be more appropriate. Actually had the same feedback from Jonah of Privacy Guides.
I use AES encryption with a single public key at the moment. That way, if I want to give the option to the user to create encrypt with a custom key, I don’t have to change the encryption method.
EDIT: Editing the title of this thread ̶P̶r̶o̶t̶e̶c̶t̶