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This invention describes a security system where a mobile phone continuously authenticates its user to a nearby protected device or secure area. The phone sends out a unique, unpredictable wireless signal, and as long as it stays within a close range, the user maintains access. This system specifically uses near-field wireless technology for proximity-based access control to physical spaces or digital resources.
Why it matters: Filed before Ultra-Wideband (UWB) technology became common in mobile devices, which offers much more precise and reliable near-field proximity detection. Modern mobile device secure enclaves also provide more robust generation of non-predictable values.
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