A lock refers to various types of devices to secure a door. While there are combination locks, smart card locks, and key locks, the mechanism known as a cipher lock is opened by a programmable keypad and, by definition, is not a true lock. There is also a specific type of encryption lock called Cypher Lock®, developed by Continental Instruments, now a division of Napco Security Group.
An encrypted padlock is opened with a programmable keyboard.
The US Army distinguishes the use of keyed and encrypted locks, stating that the purpose of encrypted locks is to maintain physical security, while the purpose of encrypted locks is to control access by limiting unannounced intrusions or unescorted entry to specific areas of a facility that are sensitive Cryptographic locks are used to control access to areas such as airport control towers, computer rooms, corporate offices, embassies, areas within financial institutions, research laboratories and development, storage areas containing weapons, controlled substances, etc.
An encryption padlock may have four or five buttons, depending on the manufacturer. Even with five buttons, the code can be from one to five digits. When the encryption lock unit is set up, the code is programmed and shared with authorized personnel. It can be changed at any time.
Cipher locks are available in various metallic colors and can be equipped with a button or a lever. The system can be mechanical, as is the case with Simplex cipher locks, or electronic, such as the Cypher Lock®. An electronic system makes it possible to unlock the door to one place in the room when a visitor arrives who does not have the code.
Cypher Lock®, in particular, can be combined with a set time to open the door, as well as a battery retention system. There are three types of alarm systems available. A burglar alarm interface is available to indicate when the door is breached. An error alarm may reveal that someone is trying to guess the code. Finally, a hostage alarm can be activated to indicate that the entry was made under duress.
