System for authenticating a user at and reporting about use of a charging device

A method for authenticating a user at and reporting about use of a charging device comprising:

• generating at least one first encrypted authentication element in a database unit;
• transferring the first encrypted authentication element to a charging device via a first mobile device;
• decrypting the first encrypted authentication element in the charging device;
• validating the decrypted authentication element to initiate a first charging procedure;
• generating a first encrypted charging report element in the charging device after ending the first charging procedure;
• storing the first encrypted charging report element in a storage module of the charging device;
• transferring the first encrypted charging report element to the database unit via the first mobile device or another mobile device;
• and
• providing a second encrypted authentication element after processing the first encrypted charging report element.

A charging device comprising:

• at least one wireless communication module configured to transmit charging report elements and to receive authentication elements;
• at least one storage module configured to store a sequence parameter of received authentication elements;
• at least one control module configured to control a charging procedure of a chargeable device connected to the charging device;
• and
• at least one encrypting and decrypting unit configured to decrypt encrypted authenticating elements and to encrypt charging report elements.