1. A surveillance system ( 1 ) for detecting and/or tracking at least one moving surveillance object ( 4 ) in a surveillance region ( 2 ) having a plurality of subregions ( 7 ), which subregions ( 7 ) are disposed at least partially without overlap, comprising a plurality of surveillance sensors ( 6 ) which are and/or can be spatially distributed in surveillance region ( 2 ), wherein the surveillance sensors ( 6 ) include several general classes of sensors and are designed to detect the surveillance object ( 4 ) and output detected object information, a signature lock ( 8 a , 8 b , 8 c , 8 d ) having at least one signature sensor ( 9 ) which is designed and/or disposed to detect the surveillance object ( 4 ) and output object signature information, and an evaluation device ( 10 ) designed to form and/or supplement an object signature ( 16 ) of the surveillance object ( 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 signature ( 16 ) of the surveillance object ( 4 ), wherein 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 ( 4 ); wherein a totality of the signature sensors ( 9 ) covers all the several general classes of the sensors, wherein only one surveillance sensor ( 6 ) is installed in each subregion ( 7 ), and wherein sensor-specific measurement signals obtained from the one surveillance sensor ( 6 ) in each subregion ( 7 ) is used, according to the stored object signature ( 16 ), to reliably identify or recognize the related surveillance object ( 4 ).