The Alarming Reality of Physical Security: How Easy It Is to Bypass Locks and Access Sensitive Data

Physical security is often overlooked in many organizations and it remains one of the weakest links in protecting sensitive information and critical infrastructure. Despite investments in cybersecurity, many places remain vulnerable because their physical security measures are outdated or easily bypassed. This article reveals how simple it can be to defeat common locks, clone RFID badges, and access computers without authorization. Understanding these risks is essential for critical infrastructure utility companies, healthcare facility owners, IT professionals, network admins, and office managers who want to improve their physical security assessment and protect their assets.

Common lock picking tools used to bypass physical locks

How Many Locks Can Be Bypassed Easily

Locks are the first line of defense for physical security, but many locks in use today offer minimal protection against skilled or even casual attackers. Simple tools can defeat a surprising number of locks:

• Travelers Hook: This tool is used to push the latch in when the dead latch is missing or can be rendered useless. It is effective against improperly hung doors or incorrect strike plate hole hardware being used, which is common in office buildings.

• Shims: Thin pieces of metal that slip between the latch and the door frame to release the lock without a key, similar to the travelers hook. Shims work well on padlocks and some door locks. They can even be used on pin and tumbler locks that lack any protection for accessing the key and driver pins.

• Jigglers: Also called try-out keys, jigglers are shaped to mimic a range of key cuts and can open many warded locks. These are common in file cabinets and in many office spaces.

• Removing Hinges: Exterior door hinges can sometimes be removed if they are exposed, allowing the door to be opened without unlocking it.

• Magnetic Bypass Tools: Some locks are susceptible to magnetism. This is typically effective only on specific older models of mechanical locks that do not have shielded internal parts.

• Request-to-Exit (REX) Sensor Spoofing: Many electronic locks unlock automatically when an internal motion sensor (REX) detects someone approaching to exit. Attackers can sometimes bypass these from the outside by blowing compressed air or a cloud of vapor through door gaps to trigger the sensor and unlock the door.

  
  
  
  

Lock impressioning and decoding keys are more advanced techniques that involve creating a working key by analyzing the lock’s internal mechanism or by using specialized tools to read the key cuts. These methods require skill but are still accessible to many attackers. It is even possible for an attacker to take a picture of a key and use that to decode it and make their own working copy.

Specialized Tools That Bypass Locks

Some locks require more specialized tools, but these are widely available and easy to use with minimal training:

• Adam Rite Bypass Tools: Designed to open commercial aluminum storefront doors without damaging the lock or door.

• Under the Door Tools: Long, thin tools that slide under doors to manipulate locks or door handles from the inside.

• Lock Impressioning Kits: These kits allow attackers to create a key by inserting a blank key into the lock and turning it to leave marks that reveal the pin positions.

• J-Tool: Designed to bypass double doors by sliding through the gap between them to reach inside and manually flip the interior thumbturn.

• Bump Keys: Specially cut keys that "bump" the pins inside a lock to the shear line, allowing the lock to turn. Bump keys can open many pin tumbler locks quickly.

  
  

These tools are often sold online or in locksmith supply stores, making it easy for unauthorized individuals to obtain them. This is only scratching the surface of the available tools used for these attacks.

Flipper Zero Device Used to Clone RFID Badges

The Threat of RFID Cloning

Many facilities use RFID badges for access control, but these systems can be surprisingly easy to bypass. A basic 125kHz RFID cloning setup costs under $100 and can clone many common access cards in minutes. The process involves:

• Scanning the RFID badge with a reader.

• Copying the data to a blank RFID card or key fob.

• Using the cloned card to gain unauthorized access.

  
  

This vulnerability is especially concerning for critical infrastructure and healthcare facilities where access control is vital. Many organizations fail to perform a thorough physical security assessment that includes testing RFID systems for cloning risks.

Physical Access to Computers and Data Theft

Physical security weaknesses extend beyond doors and badges. Gaining physical access to computers can allow attackers to steal sensitive data quickly, especially if full disk encryption is not enabled. Some common risks include:

• Removing Hard Drives: An attacker can remove a hard drive and connect it to another machine to copy data without having to know the password.

• Booting from External Devices: Without BIOS or UEFI password protection, attackers can boot a computer from a USB drive loaded with hacking tools. This can allow full access to the information on a computer without having to know the password or remove the hard drive.

• Plugging in USB Devices in Public Areas: Many public or shared workspaces allow USB ports to be used freely. This opens the door to malware infections or data theft via USB drops or infected devices. Attackers could even use a device known as a rubber ducky that emulates a keyboard. Once plugged in, it can run commands in the background without anyone using the computer ever knowing. This could allow an attacker to gain complete access to the computer just by plugging in a USB.

• Tailgating: Unauthorized individuals follow authorized personnel into secure areas without proper checks, bypassing physical security controls.

  
  

These risks highlight the need for strict policies on physical access to computers and the importance of full disk encryption to protect data at rest.

Computer workstation with accessible USB ports in a public space

Why Most Places Are Unprepared for Physical Security Threats

Many organizations focus heavily on cybersecurity while neglecting physical security. This imbalance leaves them vulnerable to simple attacks that bypass digital defenses entirely. Common issues include:

• Lack of regular physical security assessments to identify weak points.

• Use of outdated or low-security locks.

• Poor control over access badges and RFID credentials.

• Inadequate training for staff on tailgating, social engineering, and unauthorized access.

• No enforcement of encryption or secure boot policies on computers.

• Unrestricted use of USB ports in public or semi-public areas.

  
  

Improving physical security requires a comprehensive approach that includes regular assessments, updated hardware, employee training, and strict enforcement of security policies.

Taking Physical Security Seriously

Organizations responsible for critical infrastructure, healthcare, and sensitive data must prioritize physical security alongside cybersecurity. A thorough physical security assessment can reveal vulnerabilities before attackers exploit them. Key steps include:

• Upgrading locks to high-security models resistant to picking and bypass tools.

• Using RFID systems with encryption and anti-cloning features.

• Enforcing full disk encryption and secure boot on all computers.

• Restricting USB port access and monitoring for unauthorized devices.

• Training employees to recognize and prevent tailgating.

• Securing door hinges and other physical entry points.

  
  

Physical security is not just about locks and badges; it is about creating a layered defense that protects people, data, and infrastructure from real-world threats.