Phylagen, a San Francisco biotech company, has developed a technique for tracking previous locations of objects based on the composition of dust the object has collected.
In another experiment, the sampling technology allowed researchers to determine where a person had walked within 1 kilometer in San Francisco, because of the microbes picked up by their shoes.
Right now, this technique is proposed for use in tracking manufacturing locations in supply chains. If it’s successful, expect it to be used first in forensics, and then in ubiquitous “backwards” location tracking for behavior profiling.
Oh, great. Now, in addition to fresh clothes and a good scrub in the shower, I need to swap/brush/scrub my shoes to keep the snoops of the world at bay.