An electrical device includes a functional unit subdivided into a secure functional block and a non-secure functional block. The functional unit has a single transmission device for transmitting information from the secure functional block into the non-secure functional block. The functional unit has a first interface device and the first interface device is arranged in the non-secure functional block. A key is stored in the secure functional block. The secure functional block is designed to assign an identifier to a meaning using the key, to form a value pair from the identifier and a value, and to transmit the value pair via the transmission device in the non-secure functional block. The non-secure functional block is designed to transmit the value pair via the first interface.