Abstract: In the case of keys which cooperate electronically with an object, for example a motor vehicle, it is often necessary to produce a new key. These keys must be available rapidly at remote locations, so that the object-specific key information must be transmitted and written into the key in a secure manner. For this purpose, according to the invention, object information is transmitted from the remote station to a central station, which reads out the key information stored for this purpose and encrypts it with identification information stored both in the central station and in the key and transmits this to the key. By means of the secret identification information stored therein the key is capable of recovering and storing the original key information.