a milligrams of chemicals in a binary sequence of presence or absence creates a 32 or 48 bit number and only needs 50% on average of the milligrams in a couple of pounds a lot of material reduces it to a set of 48 small boxes on average.
In 1976 court cases revealed people caught by feds from taggants :
UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF TEXAS UNITED STATES OF AMERICA MAGISTRATE'S DOCKET NO. v. C-76-500M
GUS CARGILE RESIDENCE LOCATED AT 4313 SEQUOIA CORPUS CHRISTI, TEXAS
"The identification of taggants in this case was a major contributing factor in this investigation that led to the arrest of the suspect"
https://en.wikipedia.org/wiki/Taggant
The manufacturer just records the serial numbers of each minor mix of chemicals in a journal matching shipment records to dealers.
now they want the bullet metal tagged AMD the primers tagged , not just the nullet rifle pattern stored from a swappable barrel:
https://duckduckgo.com/?q=taggant+primers+gun+bullet&t=ffsb&ia=web
Wtf
Say you can add or not ad one or more of 10 different benign substances to gunpowder. Then detect presence of each (e.g. ) to get a 10-bit value. This gives 1024 different values you can encode, to denote which batch of powder it is.
(post is archived)