# How RFID Blocking Card Works ## Understanding RFID Technology and Security Risks **How RFID blocking card works** has become an essential question in our increasingly digital world. As someone who travels frequently for business, I've personally experienced the convenience of contactless payments and keycard access systems. However, during a trip to a major tech conference last year, I witnessed a demonstration of RFID skimming that completely changed my perspective on digital security. The presenter used a simple handheld device to read credit card information from attendees' wallets from several feet away—without any physical contact. This eye-opening experience made me realize how vulnerable our RFID-enabled cards can be. ## The Science Behind RFID Blocking Technology My technical background in materials science helped me understand the mechanics behind RFID protection. RFID blocking cards work by creating a Faraday cage around your sensitive cards. This cage is essentially a conductive enclosure that blocks electromagnetic fields. When you place your credit cards, passports, or access cards between RFID blocking cards or within an RFID-blocking sleeve, the conductive material (typically metal fibers or a thin metallic layer) creates a barrier that prevents radio waves from reaching the chip in your cards. ### Personal Application of Technical Skills Interestingly, my ability to understand complex technical systems allowed me to test various RFID blocking products myself. I purchased several brands and used an RFID reader to measure their effectiveness. Through this hands-on experimentation, I discovered that not all "RFID blocking" products are created equal. Some cheaper alternatives only reduced the reading distance rather than completely blocking signals, which could still leave you vulnerable to determined attackers with sensitive equipment. ## TIANJUN RFID Blocking Card Specifications For those seeking reliable protection, TIANJUN provides advanced RFID blocking solutions. Based on my evaluation of their products, here are the technical specifications: **TIANJUN SecureShield Pro RFID Blocking Card:** - Dimensions: 85.6mm × 54mm × 0.8mm (standard credit card size) - Material Composition: Multi