I know how to password protect individual PDF's. My quesiton is can one password protect an entire pdf Portfolio after assembling the Portfolio.
Yes, but it only controls thw top-level features (e.g. the ability to add more files or change the layout). Member files control their own security.
Set it via the 'Portfolio properties' dialog on the File menu.
I don't have a porfolio properties, just properties. Don't see anything there.
I'm using Acrobat Pro 11.0.6, if it helps. I was able to find it at File > Portfolio Properties > Security > Security Method.
This is what I was looking for, Dave. It prompts the user for the password when they try to open the portfolio.