I found out about de Bruijn sequences while brute forcing a digital door lock (it was my own door, my landlord changes the code sometimes). It only works when you are able to keep entering digits until you hit the correct sequence. If the thing resets every four digits, it's useless of course.
A four digit key will yield a 10003 digit de Bruijn sequence so if you push 2.5 keys/s it will take you at most 7 hours to hit the correct key. Doing all keys in sequence 0000, 0001, ..., 9999 will take you at most 28 hours.
A four digit key will yield a 10003 digit de Bruijn sequence so if you push 2.5 keys/s it will take you at most 7 hours to hit the correct key. Doing all keys in sequence 0000, 0001, ..., 9999 will take you at most 28 hours.
Did I find the code? Yes, I asked the neighbor.