In movies, cracking safes is often dramatized, full of exciting shots and seemingly magical techniques. But in reality, the cracking of safes requires professional knowledge, tools, and a lot of time, and is often limited by the design and security level of safes. The following are several technical methods and their principles that may exist in reality： --- ### 1. Cracking of mechanical password locks **1. Listening to unlock (traditional turntable lock)** -**Principle**: Old-fashioned turntable locks (such as S&G locks) determine the position of the password through the small vibration or sound differences of the internal mechanical components when the turntable rotates. Professional locksmiths are trained to perceive the touch or sound (such as a slight “click”) of the turntable stuck in the correct position. -**Realistic difficulty**: It requires extremely high concentration and experience, and the locks of modern safes will add anti-snooping designs (such as damping devices or random noise interference), which greatly increases the difficulty of cracking. **2. Drilling and peeping** -**Method**: Drill a hole in the side of the safe, insert an endoscope or camera to observe the mechanical structure of the internal turntable, and directly read the password position. -**Protective measures**: High-end safes will be equipped with anti-drilling steel plates (such as hardened steel or ceramic layers) around the locks. Drilling takes a very long time and may trigger alarms. --- ### 2. Cracking of electronic password locks **1. Default password or backdoor vulnerability** -**Principle**: Some low-end electronic locks may retain the factory default password (such as 0000), or there is a software vulnerability that allows the password to be reset. -**Protective measures**: The compliance safe will force the user to change the password when using it for the first time, and prevent external detection through the encryption chip. **2. Electromagnetic pulse attack (EMP)** -**Method**: The electronics are locked and reset through electromagnetic interference, but professional equipment is required and the success rate is extremely low. -**Realistic limitations**: Most electronic locks are designed to prevent electromagnetic interference, and such attacks may directly damage the locks. --- ### 3. Physical destructive means **1. Thermal cutting (oxygen acetylene cutting)** -**Applicable scenarios**: For steel safes, melt the door shaft or lock area through high temperature. -**Disadvantages**: High temperature, fire and noise are generated, long-term operation is required, and modern safes may be filled with fireproof cement or composite materials to resist cutting. **2. Angle grinder or electric drill** -**Method**: Violently destroy the locks or hinges, but high-security safes will use anti-drilling alloys (such as tungsten carbide) and multiple locking structures to greatly extend the damage time. **3. Lock picking tool (for low-end safes)** -**Principle**: The gap in the door of the box is forcibly opened by crowbars or hydraulic tools, which is only effective for small safes with weak protection. --- ###4. Social engineering attack **1. Password theft** -**Method**: Obtain the password by observing the user entering the password, surveillance camera playback, or phishing. -**Protection recommendations**: Change your password regularly, block the keyboard when entering, and avoid using simple number combinations (such as birthdays). **2. Internal personnel cooperation** -**Real-world cases**: Some safe thefts in history have involved employees leaking passwords or assisting in the destruction. --- ###5. Safety design of real safes Modern high-security safes (such as the UL-certified TL-15/TL-30 standard) will use the following protections： -**Composite structure**: steel shell + fireproof cement + anti-drilling layer. -**Anti-theft locks**: If the password is wrong too many times, it will automatically lock or alarm. -**Biometric recognition**: Fingerprint or iris recognition increases the difficulty of cracking. --- ###Summary: The gap between movies and reality -**Time cost**: It may only take a few minutes to crack in the movie, but in reality it takes hours or even days. -**Technical threshold**: Professional locksmiths require many years of training, and legal cracking usually requires authorization from the police or the owner. -**Risk**: Illegal cracking of safes is a criminal act, and real-world security systems (such as monitoring and vibration sensors) will greatly increase the risk of arrest. The core security logic of the safe is ** “Extend the cracking time and force the attacker to give up”**. Therefore, choosing compliance products and using them rationally is the key to protecting property.