17 Dec
2003
17 Dec
'03
11:17 p.m.
Steganographic signatures. Similarly, signatures are being put into explosives (although they are somewhat traceable already) by using various mixtures of trace elements.
I believe that they also use small (microscopic) color coded chips of plastic. There is an OTA report on this topic with a name something like "Taggants in Explosives". I believe that the report is about 10 years old.
I remember hearing about how one congress member removed the taggants from a sample of gunpowder using tweezers during a terrorism hearing. Taggants can't really be relied upon. Doug