We present G-ID, a method that utilizes the subtle patterns left by the 3D printing process to
distinguish and identify objects that otherwise look similar to the human eye. The key idea is
to mark different instances of a 3D model by varying slicing parameters that do not change
the model geometry but can be detected as machine-readable differences in the print. As a
result, G-ID does not add anything to the object but exploits the patterns appearing as a by-
product of slicing, an essential step of the 3D printing pipeline. We introduce the G-ID slicing …

We present G-ID, a method that utilizes the subtle patterns left by the 3D printing process to
distinguish and identify objects that otherwise look similar to the human eye. The key idea is
to mark different instances of a 3D model by varying slicing parameters that do not change
the model geometry but can be detected as machine-readable differences in the print. As a
result, G-ID does not add anything to the object but exploits the patterns appearing as a
byproduct of slicing, an essential step of the 3D printing pipeline. We introduce the G-ID …