Add password to PDF

I'd like to request the ability to add a password to an existing or newly created PDF.

Thanks,
Andrew

You can do this using third party utilities, we do not provide that...

We support opening files that already has a password

Yes, we currently use the ability to open password protected PDFs.

Right now if we want save only a single page from a password protected PDF, we must copy the PDF file, open it, remove all but the one page from it, then save it (which preserves the password protection).

We would like to be able to just create a new PDF, import the one page from the original PDF, and add a password to the new PDF.

If there is a third party utility we could use to do this programmatically on Android and Windows, could you let me know what that is?

Thanks,
Andrew