With Numlock Handle You can leave home and forget the key, but not the combination. Jaeseok Han He has designed a door handle that incorporates a locking system that opens them by introducing the exact combination by means of its casters. After opening the door, the wheels are put into operation to re-mix the numbers. I can think of several advantages and some inconvenience, namely ...
The clueless will have a contradictory feeling, so that forget the key It will no longer be a problem, but instead, the combination should be marked on fire in your brain. Those who handle passwords on a daily basis already know that they are double-edged weapons, since normally the safer the harder they are to remember, and if we use dates, names or series of recognizable numbers, we are actually leaving the house door open .
Therefore, it will only be suitable for people with bomb-proof memory, for which the nuisance of always carrying the keys is removed, without the possibility of losing them or stealing them. Going for a run in the park without more company than a tiny mp3 and without feeling the clink of the keys to each stride, is one of the advantages of this system.
We can also share password with guests, without the need to make and distribute sets of keys, or in case of absence, if there is an incident and someone must enter the home, with facilitating the combination the problem is already solved. But, yes, without forgetting to change it as soon as you get home.
Anyway, it seems to me a slightly exposed system, if you do not have the precaution of changing the password often, and still, it still does not convince me at all.