additional authentication for certain content types based in a number and name?

Hello,

I hope I chose the right category for this and you can help me, either with a module that already does this or have some ideas on how to do this.

I need a way to have content types to be viewable only for certain members. Well that's not hard I could do that with role types easily, however these specific members have a paid membership with an actual member card (like a credit card).
Each of these cards have a unique number. What I need to create is a way to let the users add their card number to their profile and at registration at the community and then give them access to certain pages.

When adding their member card, the module, script or whatever should verify if the number AND their name (which is in their profile already) attached to it are correct. The valid member numbers and names should be entered in the admin area by the Admin only.

based on that verification I should be able to give those members with an actual card access to content only they can see.

does a module like this already exist and if not is there a way to easily create something like this and if so how??

Please share your thoughts, I know PHP and MySQL well but I'm not an expert in Drupal yet.

Help is much appreciated.

Tino