by Vuong Nguyen on WordPress.org
WP Security Master is great tool to add another security layer to protect your page. It automatically locks the admin page with passcode.

Main Interface when running
Securing your WordPress by deliberately disabling all functions in dashboard. Re-activate the site by providing the hashed password. It secures your site by providing another layer of authorization.
WP Security Master enables you to:
This plugin does not require any technical knowledge.
Vuong Nguyen at https://tudien.net