2.3.3 DNA taggants
Highly specific DNA “lock and key” reagent systems can be applied to packaging by a
variety of printing methods. They require a “mirror image” recombinant strand to effect
the pairing, and this reaction is detectable by a dedicated device. Security is further
assured by hiding the marker and reagent pair in a matrix of random DNA strands, but
the test is tuned to work only with one recombinant pair.