Abstract: An efficient method and a system for controlling access to a location secured by a lock mechanism controlled by a lock control unit, which may provide a high degree of flexibility and a high level of security. The method includes the steps of storing a first access code in the lock control unit, the first access code being indicative of a predetermined access right to the location, and storing a plurality of access codes including a second access code in an electronic key device. Using the electronic key device, access to the location is requested by initiating transmission of the second access code to the lock control unit where the transmitted second access code is compared with the first access code and, if the first access code corresponds to the second access code, operation of the lock mechanism is initiated. The user can edit and rearrange the plurality of access codes to obtain access to a plurality of locations.

Abstract: An efficient method and a system for controlling access to a location secured by a lock mechanism controlled by a lock control unit, which may provide a high degree of flexibility and a high level of security; the method comprises the steps of storing a first access code in the lock control unit, the first access code being indicative of a predetermined access right to the location; storing a second access code in a second storage means; using an electronic key device for requesting access to the location by initiating transmitting the access code from the second storage means to the lock control unit; comparing the transmitted second access code with the first access code; and if the first access code corresponds to the second access code, initiating operating the lock mechanism; the invention further relates to a method of managing a predetermined access right to a location.