Korea the keyless country

I am absolutely loving the fact that I don't have keys for my apartment. I think it's a fairly standard practice in Korea (although I could be wrong)but instead of having locks on your door you have a special security box with a code. So on the outside door to my building there is a secret little box attached to the door. I lift up the flap and it lights up to reveal a keypad on which I type in the secret code. It then makes some funky noise and the door unlocks. When I go upstairs to my apartment I have a similar keypad on my door and I have to type in another secret code. It's so much fun that I sometimes leave my apartment for a few minutes just so that I can come back and play with it. I never have to worry about losing my keys but I better not forget that code!!