Method for watermarking a three dimensional object and method for obtaining a payload from a three dimensional object

The invention relates to a method for watermarking a three-dimensional object. The watermarking method comprises computing an original signature of a local neighborhood of a current vertex among the plurality of vertices of the three-dimensional object; obtaining a target signature from the original signature and a watermark payload; and modifying said local neighborhood wherein a position of at least one vertex of said local neighborhood is modified such that a modified signature of said modified local neighborhood is close to said target signature and wherein at least a vertex of said modified local neighborhood is not modified. The invention further relates to a method for obtaining payload from a three-dimensional object wherein a signature of a local neighborhood of at least one vertex among a plurality of vertices is close to a target signature and wherein the target signature is obtained using an original signature corresponding to an original three-dimensional object and using a watermark payload. The invention further relates to a 3D object carrying a watermark and to devices for implementing the disclosed methods.