In this lightning talk from the recently concluded 28C3 Chaos Communication Congress in Berlin, Aram Bartholl presents updated information on the topic of dead drops. Dead drops are a means of anonymously conveying data using USB drives physically embedded in public spaces. (See this post from 2010.) This talk also highlights the existence of WiFi dead drops as well as “live drops” which are anonymous data exchange parties.
You can get more information on this phenomena as well as a world map of drop sites at deaddrops.com.