KEY AND LOCK DEVICE

摘要

A method of authorising a key or lock device comprises the following steps: a first user device (UD1) and a first system device (SD1) used in a first leve l of a lock system, such as at a manufacturer, are created. A first encryption key (Key1) is stored in the first user device and the first system device. When the user device is to be shipped to a second level of the lock system, such as a locksmith, an authentication process is carried out between the first user device and the first system device using the first encryption key stored therein. In case the authentication process was successful, a softwar e operation is carried out by the first system device, by which the first encryption key stored in the first user device is replaced by a second encryption key (Key2). This second encryption key is stored in second system and user devices (SD2, UD2, UD3) used in the second level of the lock system , thereby making the first user device operable with the second system and use r devices. This prevents unauthorised use of keys and locks.