Aluminum Foil Can Block RFID Signals in Passports and Hotel Key Cards, With Limits
Wrapping electronic passports or hotel key cards in aluminum foil can block unauthorized RFID scans by creating a Faraday cage that disrupts wireless signals. US e-passports include built-in shielding effective when closed, while foil offers temporary protection. However, foil does not prevent advanced cloning techniques or physical vulnerabilities in hotel locks. Experts note that remote RFID skimming is rare, and reporting lost keys remains the best security practice. Specialized RFID-blocking sleeves provide more durable protection than foil.
First-hand measurement across 2 sources
We measured how 2 outlets covered this story. No outlet gave this story a measurable political slant — there is no left–right reading to report. Overall sentiment is neutral (54/100). Lens Score 33/100.
Outlets measured: economictimes, economictimes. See how each one headlined and framed the same story in the source comparison below.
AI Analysis
Sentiment was consistent across outlets (52–55/100), indicating broadly factual reporting rather than editorialising.
Coverage timeline
economictimes broke this story on 21 Jul, 02:08 pm. Other outlets followed.