For example, a husband and wife were driving with $14,000 cash to buy a car when an automobile from Homeland Security pulled alongside them for a minute to scan their car. When they realized the car had $14,000 in it, they informed the local law enforcement which then proceeded to pull the car over to confiscate the money. Or the sheriff in Northern California who uses a similar "detector" to pull over people who are bringing cash to Nor Cal to buy cannabis during harvest season. From what I've read, wrapping anything that has the RFID in it with aluminum foil or a Faraday cage-like material is enough to block any signals. I think your readers would find this very interesting.
Thanks Kevin I appreciate it.
FutureWatch: I looked into it and found some interesting articles. It appears the U.S. Treasury department is looking into it. They currently have a Request for Information (RFI) out to develop this technology. Answers due by January, 24, 2020.
Technical papers on this technology include...
Banknote Validation through an Embedded RFID Chip and an NFC-Enabled Smartphone
A Comparison Survey Study on RFID Based Anti-Counterfeiting Systems
RFID banknotes
Apparently, this technology has been explored since at least 2001. I couldn't find that it has been implemented anywhere... yet. It appears it may be coming, however.
Our BBI is correct. RFID readers can be easily blocked by Faraday Cage techniques.
All this reminds me weapons of war; evolutionary stair-step escalation through the ages.
Double FutureWatch: RFID tracking of currency may become a moot point if governments leap-frog into cryptocurrencies.