Password Input Field With No Cache?

I've got a bunch of similar pages using a password to access the content - using Simon's awesome solution here: https://www.sly-design.co.uk/perch-cms/

The field though, remembers the password through various browsers... but often with lots of similar pages, it's not useful. You end up having the clear the field and enter the correct one.

So is there a tag I can add to the input field that doesn't allow caching, so it forces a clear input field each load?