Patent attributes
The invention relates to a method for logging a service technician into an electrical device (20), comprising the following steps: production (3, 4) of a secret key (SKY) as an encrypted login password (LPW) by the electrical device (20), displaying (5) of the secret key (SKY) on a display unit (23) of the electrical device (20) as a QR code (QRC), optical sensing (6) of the QR code (QRC) by means of a mobile device (22), decryption (9) of the login password (LPW) from the secret key (SKY) of the sensed QR code (QRC) by the mobile device (22), displaying of the login password (LPW) on a screen unit (24) of the mobile device (22), entering of the login password (LPW) into the electrical device (20) by the service technician, comparison (10) of the entered login password (LPW) with the produced login password (LPW) by the electrical device (20), release of the login by the electrical device (20) if the two login passwords (LPW) match. The invention further relates to an associated apparatus. The advantage of the invention lies in the combination of the high strength of the cryptographic security with the user friendliness of the QR code and of the relatively short login password to be entered.
