Moneydance can password protect your data file for additional security.

To encrypt your data file, select File → Passwords and enter a Master Password.

If you lose or forget your password we cannot retrieve your data. Choose your password and hint carefully.

If you would like Moneydance to remember your passwords for automatic downloads, you can select the “Store Online Passwords in File” option.
After enabling this, you'll need to enter your login credentials once more before they're stored.