Physical Security Bypass Techniques (Beyond Lock Picking)
📌 The speaker, part of a covert entry team, emphasizes that lock picking is often the ninth resort when trying to gain access to buildings, contrasting popular romanticized notions.
🔨 A very easy method of entry involves removing hinge pins; this can be easily secured by installing inexpensive jamb pins (costing about \$2) to create a security hinge without rehanging the door.
🎣 Latch slipping using simple tools like a small hook (like a \$5 student kit part) is highly effective, especially when doors lack a dead latch plunger (guard bolt) mechanism.
⚙️ Improper door fitment, such as poorly installed strike plates with excessively large holes (even on electronic access doors), renders strong locks ineffective; a \$5 hook can bypass these due to poor installation.

Exploiting Access Control and Emergency Systems
💨 Passive Infrared (PIR) motion sensors on request-to-exit (REX) sensors for electronic locks can be tricked by creating a sudden cold gas cloud (e.g., by inverting an R134a duster), causing the door to unlock.
🌡️ The speaker recommends GE's dual-technology REX sensor (PIR and microwave radar) as a superior solution because it requires both a temperature change and confirmation of a human-sized presence, thwarting simple gas cloud attacks.
🚪 To bypass doors with lever-style handles (common in modern offices due to accessibility codes), an under-door tool can be used to reach inside and swing the handle open, as the exit mechanism is often just a simple pull/push.
🛑 Solutions against under-door tools include installing dynamic door bottoms (which drop a bar when the door closes) or installing door shrouds (sometimes simple, inexpensive furniture feet repurposed from hotel closet doors) over the handle.

Common Vulnerable Keys and Systems
🔑 The CH751 key is highlighted as the "everything key" in the US, fitting common wafer locks on filing cabinets, facility boxes, and more, often found by simply trying it on various locks during an assessment.
🚔 The Ford Motor Company fleet key, 1284 X, often opens police cruisers, glove boxes, and trunks, as it is not a chipped or restricted key and can be cut at basic hardware stores.
💻 Linear access control boxes consistently use the same key (historically the A126, now the 222343 key), which can be used to flip the relay, unlocking doors secured by these units.
🎛️ DoorKing systems are universally identifiable by three large buttons; they all use the 16120 key to open the main panel, which often allows direct bridging of the door relay dry contacts (relay 1 or 2) using a piece of wire or a custom bridge tool.

Key Points & Insights
➡️ Confidence and fitting in are primary tactics for physical entry; adopting a convincing cover (like an elevator repair technician with a clipboard) often negates the need for complex exploits.
➡️ Cross-train in digital security if you are purely physical, or vice versa, as modern entry often requires understanding both electronic access controls (cloning/sniffing) and physical bypasses.
➡️ Always check the hinges, latches, and REX sensors before attempting complex lock manipulation, as basic security failures (like missing dead latches or poor door fitment) are the most common and easiest vectors of entry.
➡️ Simple, low-cost hardware countermeasures (like jamb pins or repurposed furniture feet) can frustrate attackers relying on common bypass tools, significantly increasing the effort required for entry.

📸 Video summarized with SummaryTube.com on Nov 25, 2025, 16:21 UTC