Enables you to set a global password for all your password-protected posts, and switch password protection on or off from the writing screen with just one click.
If you publish a lot of password-protected posts (or even if you don’t), you may end up using the same password for every post. With this plugin you can define a global post password from your ‘Options -> Privacy’ menu, and switch password protection on or off from the writing screen. When you change the global password, all password-protected posts are automatically updated with the new password.
Global Post Password, Plugin, WordPress Plugin