prevent authorised page caching

I am trying to work out how to prevent a page from caching. It is an html page created from a perl script. It is being called from a directory which has an .htaccess file in it to restrict viewing except on provision of a correct user name and password. The authorisation bit is working when the page is first accessed but I would like it to ask for the password again every time the page is viewed (including using the Back button) I've tried meta tags and http headers but nothing is working.
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bark10Connect With a Mentor Commented:
Even this tag:

<meta http-equiv="Expires" content="-1">

This always seems to work for me.
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