Neither is possible with Acrobat, as far as I know.
However, the first task (encrypting multiple files based on a list) can be achieved using a stand-alone tool. In fact, I've created similar tools in the past, so if you're interested feel free to contact me privately.
Thanks for the reply.
Is it possible to check the tool you created?
Please let me know how to contact with you in private.
Sure. Let's discuss it further privately. Send me an email at try6767 at gmail.com.