For example, cross

In order for the door lock to be a reliable means of protecting against hacks: focus on the presence of a certificate and guarantee when buying a lock. Make a manufacturer with a name. It is better to give preference to England, Italy, Germany. Do not scare the high cost of the castle. Anyone who saves always pays twice. Install two locks of different categories at the same time. For example, cross and leaf, cylinder and leaf. Choose a door that will correspond to the reliability of the lock. Equip locks with additional armority. Remember that only you can make a house with an impregnable fortress.