Encrypt
This plug-in makes it easy to securely obscure the contents of an entire note, one or more lines, or a snippet of text.
Decrypted data can be displayed in a temporary dialog or saved over its encrypted version in place within the note.
Passwords aren’t saved anywhere – which is good! – but could render your encrypted data inaccessible if you forget the password you used. The new ‘password hint’ feature significantly reduces that risk, while making it more practical to use different passwords for different purposes.
I use it to secure account #s, passwords, and my own and others’ personal and confidential information.