Locking system of one or more buildings

A computer-implemented method for a locking system comprising a plurality of electromechanical locks and a plurality of keys, the method comprising:

• storing, in a database for a user of a specific subset of the plurality of electromechanical locks, information on access rights of the user to the specific subset of the plurality of electromechanical locks, wherein the specific subset of the plurality of electromechanical locks is assigned to the user;
• receiving, via a user interface of a personal electronic device of the user, a write authorization from the user of the specific subset of the plurality of electromechanical locks;
• in response to the write authorization, generating an opening right of the specific subset of the plurality of electromechanical locks as encrypted data;
• upon generating the encrypted data, using a reader/writer to write the generated encrypted data containing the opening right to a service key storing as a default no encrypted data defining an opening right, the service key by default being authorized to operate within the locking system, wherein the writing is performed after checking that the user has access rights to the specific subset of the plurality of electromechanical locks;
• and
• exchanging the encrypted data between the service key and one of the specific subset of the plurality of electromechanical locks and, in response to said exchanging, using an actuator of said one of the specific subset of the plurality of electromechanical locks to set said one of the specific subset of the plurality of electromechanical locks to an open state.

A locking system of one or more buildings comprising:

• a plurality of electromechanical locks, each electromechanical lock comprising a communication interface configured to exchange encrypted data with a key, an actuator configured to set the electromechanical lock to an open state or to a closed state, and a processor configured to evaluate encrypted data read from the key to decide whether to set the electromechanical lock to the open state or to remain in the closed state;
• a plurality of keys, each key comprising a memory configured to store encrypted data defining an opening right to one or more of the plurality of electromechanical locks, and an interface configured to exchange encrypted data with the one or more of the plurality of electromechanical locks, each key being authorized to operate within the locking system;
• a database configured to store, for a user of a specific subset of the plurality of electromechanical locks, information on access rights of the user to the specific subset of the plurality of electromechanical locks, wherein the specific subset of the plurality of electromechanical locks is assigned to the user;
• a service key, by default authorized to operate within the locking system, comprising a memory configured to store no encrypted data defining, as a default, an opening right to the specific subset of the plurality of electromechanical locks, and further comprising a transceiver configured to receive encrypted data from a reader/writer;
• and
• a computer program product readable by at least one processor of a personal electronic device of the user and configured to cause the at least one processor to carry out at least the following:
• receive, via a user interface of the personal electronic device, a write authorization from the user of the specific subset of the plurality of electromechanical locks;
• and
• in response to the write authorization, cause generation of an opening right of the service key for the specific subset of the plurality of electromechanical locks as the encrypted data, and cause writing of the generated encrypted data to the service key, after checking that the user has access rights to the specific subset of the plurality of electromechanical locks.