1. A surveillance system ( 1 ) for detecting and/or tracking at least one moving surveillance object ( 4 ) in a surveillance region ( 2 ), comprising a plurality of surveillance sensors ( 6 ) which are and/or can be spacially distributed in surveillance region ( 2 ), and which are designed to detect the surveillance object ( 4 ) and output detected object information, comprising a signature lock ( 8 a, b, c, d ) having at least one signature sensor ( 9 ) which is designed and/or disposed to detect the surveillance region ( 4 ) and output object signature information, comprising an evaluation device ( 10 ) designed to form and/or supplement an object signature ( 16 ) of the surveillance region ( 4 ) on the basis of the object signature information and to detect and/or track the surveillance object ( 4 ) by comparing detected object information with the object siganture ( 16 ) of the surveillance object ( 4 ), characterized in that the signature lock ( 8 a, b, c, d ) includes at least two signature sensors ( 9 ) and is designed such that the object signal information of the at least two signature sensors ( 9 ) can be assigned or are assignable distinctly and/or unmistakably to the surveillance object.