I am using Adobe DC. I want to password protect multiple documents at one all with the same password for today, tomorrow when I receive my next set of documents I want to password protect all of them at once using the same password for all of them, but a

Hi, I'm using Adobe DC.  I want to password protect multiple documents all at once with the same password.  When I get my next set of documents, I want to password protect all of them with the same password but a different password than the last batch. How do I do this? Help, please.