I perfectly understand what are you trying to say when you tried to point out flaws with my design, however due to time constraint, i do not have that much time to worry about such flaws and thus, making a near-perfect security system is out of question. What i am trying to achieve now is to be able to present my project to my university's lecturer and convince them of the basic stuff that the system is able to perform (i certainly hope that they will not try to find a way to 'defeat' my security system like you do) :) I hope you understand what i am trying to say.

Thank you very much for your advices and it is very much appreciated. For now, i just want to keep things as simple as possible for me to be able to make it through the demo and presentation day. The security system is far from capable of being marketed anyway due to some major flaws here and there.