1. A method for backtracking the travel history of an item, the method comprising: seeding a first geographic location with a first nucleic acid tag, said first nucleic acid tag comprising an agglomerated plurality of nanoparticle nucleotide-support platforms each attached to a plurality of nucleic acid molecules, and further comprising an encapsulant surrounding said agglomerated plurality of nanoparticle nucleotide-support platforms and said plurality of nucleic acid molecules, wherein at least some of said nucleic acid molecules comprise identifying information, and wherein said first nucleic acid further comprises a first odorant; seeding a second geographic location with a second nucleic acid tag, said second nucleic acid tag comprising a plurality of nanoparticle nucleotide-support platforms each attached to a plurality of nucleic acid molecules, and wherein said second nucleic acid further comprises a second odorant, wherein said second nucleic acid tag is different from said first nucleic acid tag; detecting one or more of the seeded nucleic acid tags on the item; identifying the respective geographic location associated with each of the one or more nucleic acid tags detected on said item; and determining, based on the identified geographic locations, a travel history of the item.