Defeating Physical Intrusion Detection Alarm Wires
Bill Graydon demonstrates defeating supervised alarm wiring in physical intrusion detection systems, bypassing End-of-Line resistors and sensor loops.
Summary
The Insecurity of Supervised Alarm Wiring
Commercial and residential intrusion detection systems rely on supervised electrical circuits to monitor physical door contacts, motion detectors, and vault sensors.
Understanding End-of-Line (EOL) Resistors and Supervision
Bill Graydon explains how alarm control panels measure circuit resistance and voltage drops to detect open circuits, short circuits, and tamper attempts.
Executing Non-Destructive Wire Bypasses
Using basic electrical tools and precision measurement equipment, Graydon illustrates how an intruder can measure loop resistance and splice parallel resistive bridges without tripping the alarm.
Modern Line Security Standards and Active Polling
The presentation outlines physical protection conduits, encrypted digital polling lines, and multi-sensor supervision to secure alarm communication lines.
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