Password protection cache

Hello all
I have created a simple WordPress website with most of the pages using the standard password protection. When using the website you add the password but the trouble is the password gets cached in the browser so when you leave the website and go back to it at a later date you don’t need to enter the password again.

Is there a simple piece of code or a plugin that you can install that caches your browser out of the site on exit or after a time period? I have looked back at past FAQs and there is a few but on much older versions of WordPress that don’t seem to work.

Any help would be much appreciated