No, Final Draft doesn't have the ability to password-protect a file. It can export scripts and reports as read-only PDFs, but even these can, with the right software, be edited.
There are many third-party encryption programs available, but we haven't tested any of them so unfortunately we don't have a recommendation on which one might be best. Download.com is a good resource for retail and free file security utilities.
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https://fd.support/3CikAEs