The popularity and effectiveness of drilling techniques have also helped to reduce the use of explosives. Modern explosives are still capable of compromising any safe, but are not as widely used because of the possibility of physical injury and collateral damage. Explosives are historically popular but use has dwindled with time as more advanced relocking mechanisms have become commonplace on high-security safes, limiting the effectiveness of targetted explosives. Relockers typically trigger due to vibration, concussion, heat, or the breaking of a physical barrier, such as a pane of glass.Įxplosives are used to damage or remove hardplate material, locks, relockers, bolts, and door hinges. The relocker is a device that, if triggered, prevents the safe from being opened even if the correct key or combination is entered. The addition of relockers in some high security safes prevents drilling attacks. In drilling, one or more holes is drilled into the safe in order to destroy the locking bolt, the lock cylinder, or allow viewing of internal components to aid in lockpicking or decoding of the lock components. While this technique may not directly reveal the combination, it can drastically reduce the search space to a handful of potential combinations.ĭestructive Safecracking Also see Destructive Entry Drillingĭrilling is the most common method of destructive safecracking. Thermal and ultra-violet imaging is used against push-button or keypad based combination safes to reveal heat/UV residue on points recently touched by an authorized user. Wheel made of low density materials, such as nylon or polyoxymethylene (Delrin), are used to frustrate this kind of attack. This approach is most commonly used to find the correct position of wheels in a combination lock. Penetrating radiation (beta ray, gamma ray, neutron beam, ultrasound, X-ray) is used to reveal the correct positions of internal components. Radiological attacks are generally surreptitious unless easily detectable forensic evidence is left behind. Radiological safecracking focuses on using special tools and devices to view the safe in various methods not normally discernable by the human eye. Most modern combination safes are now designed so that wheels are properly weighted to prevent this attack. Vibration quickly became problematic on military naval vessels where vibration was a natural part of the environment. This occurs because of the weight difference between the wheel and the gate. Vibration is applied to the dial of a combination lock to force the wheel gates to slowly rotate to the proper position. Auto-dialers are generally considered surreptitious, but the mounting of the device onto the safe dial may leave forensic evidence. Auto dialers may also test factory default or predictable combinations given the model of the lock and personal information of the owner(s). Auto-dialers may either test the entire set of possible combinations or take into account the tolerances of the lock to reduce the search space dramatically. Because manipulation simulates the normal action of the combination lock it is considered surreptitious entry.Īuto-dialers (or robot dialers) are computer controlled machines that brute-force the combination of a safe. The process involves diagnostic tests using the safe dial to assess the correct position of each wheel within the lock. Manipulation of combination safes involves using sight, touch, and (to a lesser extent) hearing to determine the correct combination to open the safe. Manipulation See also Lockpicking, Impressioning, Decoding, and Bypass. Because of the popularity of combination locks, manipulation is most commonly associated with decoding of the combination through touch and sound. Manipulation may take the form of lockpicking, impressioning, or decoding. If one digit is known, it can open a single-function lock in less than an hour.Most non-destructive safecracking focuses on defeating the lock on the safe, either through manipulation or bypass. The Safe cracker can cover a million conceivable combinations of a standard 3-digit lock in less than 30 hours. Imagine getting ready for work on Friday and coming in on Monday and finding that the safe is ready to be opened. Soon the automatic dialer will open the lock, saving you time, materials, and extra labor. It is necessary to install the device to any standard combination lock (dials right-left-right) following simple instructions and watch as the computer and the drive motor work for you. The device can pick a million combinations for a standard three-digit combination lock in 30 hours of operation. Safe Cracker (safe dialer) – machine for picking codes of mechanical three-disk code locks such as LaGard and Sargentĭevice designed to open ATM and safe deposit box locks without damaging them
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