Numeric code (PIN)
The most common way to open an electronic lock is to enter a numeric code using a keypad. The length can vary, but for access doors and safes in the home only four to six digits, which are easy to remember, are normally used.
In the simplest case, a single numeric code serves as an opener for all authorised persons. However, an electronic lock can do much more. Depending on the performance class, up to several hundred different users can be defined, each with their own access code.
This is referred to as a Personal Identification Number (PIN). Depending on the security class, user codes with at least six or eight digits are applied. The logged opening and closing processes can then be uniquely assigned to one specific person.
A further option to increase the security level is the combination of two different numeric codes. The first could be a personnel number which can also be used elsewhere, for example when logging into IT systems. The second number can then be either a general or a personal opening code.
Especially in business operations, this procedure offers advantages in the management of access and locking systems. Individual employees, for example, can have their user authorisation revoked when they leave the company without this requiring any changes for other users. If, on the other hand, only one general code is used, it has to be changed regularly to ensure security.
Last but not least, the entry of a number code can also be combined with other procedures, such as the use of cards and RFID tags or biometric recognition procedures.