Spy Dust (Schneier on Security)

2015-05-20 13:06

Used by the Soviet Union during the Cold War: A defecting agent revealed that powder containing both luminol and a substance called nitrophenyl pentadien (NPPD) had been applied to doorknobs, the floor mats of cars, and other surfaces that Americans living in Moscow had touched. They would then track or smear the substance over every surface they subsequently touched....

News URL

https://www.schneier.com/blog/archives/2015/05/spy_dust.html

#security #SPY