I was recently gifted a wallet that alleges to block RFID signals. As I am sure you fine folks at Information Security are aware, this is to protect the information stored on my contactless bank card and company ID. It seems to work some of the time... I can't swipe into my office if my ID is in the wallet, but my bus pass will still scan. It's suspect!
I would like a scientific and repeatable way to test the efficacy of RFID blocking abilities of my wallet. I am looking for something beyond just testing the card at my business or on the bus, as this has been inconsistent. I am not opposed to purchasing something, but I don't know where to look nor what is sufficient.