1. A sensor system for a locking system of a door, comprising: an acceleration sensor configured to detect movements of the door in at least two dimensions; a magnetic field sensor configured to detect a magnetic field in the area of the locking system and to detect changes of the magnetic field; and a control device coupled to the acceleration sensor and to the magnetic field sensor, wherein the control device is configured to (i) record a time-resolved acceleration profile from the detected movements of the door, (ii) record a time-resolved magnetic field change profile from the detected changes of the magnetic field, (iii) determine a profile correlation between the time-resolved acceleration profile and the time-resolved magnetic field change profile, (iv) compare the determined profile correlation to a predetermined correlation signature, and (v) output an alarm signal if the profile correlation matches the predetermined correlation signature.