I don't think that whoever it was that asked the original question about modifying a doorlock so it can be opened electronically will consider which type of credential to use based on your brief review which sounds more like a syllabus worthy of Mission: Impossible than something likely to happen in real life...
These doorways are in a University... Someone hanging around the hallway outside a computer lab for hours and hours would be noticed eventually... Unattended backpacks/briefcases/etc are MORE suspicious today than they would have been just a few years ago...
The point behind upgrading a doorway to use electronic technology to control admittance is the fact that in the event something happens inside the room (equipment theft, vandalism, etc.) it is easier to audit an access log stored on the PC hooked up to the controller unit and focus the investigation efforts on those few people than it would be to check and see who has been issued keys to the door to the lab and have to track them all down and ask questions...
Besides all of your babbling about the best ways to beat electronic access devices your inference to "someone who knows what they are doing" is incorrect... Someone who knows what they are doing would look for the simplest way in and forget all of the Sci-Fi crap and entry techniques that belong more in movies than in the real world...
Evan, ~~formerly a maintenance man, now a college student