ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
During a physical access control review, you are asked to choose a wireless badge technology that inherently limits eavesdropping by operating at very short range. Auditors note that attackers can still perform relay (proxy) attacks to extend the signal and unlock doors from a distance. Which technology best matches these characteristics?
Near-Field Communication (NFC) is engineered for extremely short-range links-typically less than 4 cm-making casual interception difficult. Despite this, researchers have shown that an adversary can insert two coordinated devices that relay the RF conversation between a legitimate badge and reader over a longer channel, effectively defeating the distance limitation. Bluetooth Low Energy, Wi-Fi 6, and LTE all have far greater intended ranges (meters to kilometers) and do not rely on the close-coupling model described, so they do not fit the scenario.
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What is Near-Field Communication (NFC)?
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What is a relay attack and how does it affect NFC security?
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How does NFC differ from Bluetooth and Wi-Fi technologies for access control?
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ISC2 Systems Security Certified Practitioner (SSCP)
Network and Communication Security
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