Explore the intricacies of RFID technology and its security implications in this comprehensive conference talk from BSides Tampa 2018. Delve into the world of MiFare cards, various classes of RFID tags, and their historical development. Examine potential threats in targeted network environments and learn about implementation pitfalls to avoid. Discover techniques for sniffing reader network traffic and the importance of encryption. Gain insights into creating system master keys, understanding data keys and tags, and exploring MiFare memory structure. Witness a crypto demo and explore the challenges of encrypted databases and tag updates. Analyze cloning techniques, RFID operating frequencies, and quadrature sampling. Investigate reflection coefficients and tag comparisons using a scientific setup. Conclude with a discussion on overcoming challenges in RFID technology and explore valuable references for further study.