A vTag® is a ‘virtual tag’. It functions like a tag but without any modification to the part. Like a human fingerprint or iris scan, a vTag® uses intrinsic surface features of an item to uniquely identify it from all other items of its kind. The intrinsic features of an item are micron-scale roughness, formed randomly during the fabrication of the item. They are well known in the scientific literature1 to be completely unique and impossible to replicate.
1. J. Buchanan, R. P. Cowburn, et al, ””Fingerprinting” documents and packaging,” Nature, Vol 436, pp. 475, 2005.