Did you know that an estimated 70% of security breaches involve access control systems? Modern access control systems have significantly evolved to protect the integrity of data centers and businesses. While traditional access control systems still exist, their space is shrinking day by day. Access control systems regulate who can enter or exit a building, room, or area.

These systems can enhance your business operations’ security, convenience, and efficiency. However, with the rise of technology, not all access control systems are safe from cyber-attacks. Devices like Flipper Zero can compromise the security of your access control systems and cause financial and physical damage to your business.

In this blog post, we will understand what a Flipper Zero is, how someone can Flipper Zero bypass your access control system using Flipper Zero, and some important tips to safeguard your access control systems from Flipper Zero Hacking.

What is a flipper zero? How Does it Work?

A Flipper Zero is a tiny hardware device that can interact with digital systems in real life and grow while you use it. It can read, copy, and emulate different types of signals.

How Does it Work?

The workings of Flipper Zero are relatively straightforward. To read and replicate a wireless signal for future usage.

Reading a Signal

To start, you need to bring the Flipper Zero close to the signal source you want it to read and replicate

Selecting the Program

Next, choose the appropriate program on the Flipper Zero’s menu that matches the signal you are dealing with. For example, select the 125 kHz RFID program if you’re working with an RFID tag or card.

Replicating the Signal

Finally, select the “Read” option. The Flipper Zero will capture the signal, allowing you to store and use it later.

flipper zero main menu

What Can a Flipper Zero Do?


Flipper Zero can read, imitate, and store smart cards used for access control and digital business cards. For example, a hacker could clone an employee’s NFC access card and gain unauthorized entry to secure areas.

125kHz RFID

Utilized in older proximity cards and animal microchips. Someone could replicate an employee’s access card to infiltrate restricted zones or tamper with animal tracking data. Flipper Zero is compatible with low-frequency radio frequency identification (RFID) and is used in supply chain tracking systems, animal chips, and access control systems.


A frequent component in many remote controls, Infrared Flipper Zero, can read and transmit signals from devices that use infrared light (IR), such as TVs, air conditioners, or audio devices. It can also learn and save infrared remote controls or use Universal remotes. An attacker could easily use a Flipper Zero to control home devices without permission or gain unauthorized access to smart home systems.

Sub-1 GHz

Sub-1 GHz is usually employed in garage door remotes and remote keyless systems for communication. Flipper Zero has a built-in module that can read, store, and emulate remote controls, allowing it to receive and send radio frequencies between 300 and 928 MHz. Someone could unlock garage doors or vehicles remotely, potentially leading to theft or unauthorized entry.

Hardware Hacking

Flipper Zero allows versatility for hardware exploration, firmware flashing, debugging, and fuzzing. The device can run code or provide control to hardware connected via GPIO. It can also be a USB to UART/SPI/I2C/etc. Adapter. Hackers could exploit connected devices, flash malicious firmware, or manipulate hardware for illegal purposes.


Flipper Zero can emulate USB slave devices, making it appear as a regular device when attached to a computer, similar to a USB Rubber Ducky. It can be pre-programmed with payloads to execute upon connection or provide functionality for USB stack fuzzing. A compromised Flipper Zero could inject malicious code into computers, breach data, or take control of the system when connected.


Flipper Zero’s unique 1-Wire connector allows it to read and probe iButton sockets. This enables it to read keys, store IDs in memory, write IDs, and even emulate keys. A hacker could replicate iButton access keys, allowing unauthorized access to secured areas or devices.


Flipper Zero has a built-in Bluetooth Low Energy module, which allows it to act as a host and peripheral device. The developers’ corresponding open-source library supports functionality for community-made apps.

Can a Flipper Zero Compromise Your Access Control System?

Yes, a Flipper Zero can potentially compromise your access control system’s integrity by copying someone’s access card credentials. A Flipper Zero is like a universal remote control that can talk to many digital devices around us. Imagine it as a magic key that can open some digital locks. Whether your access control system is vulnerable depends on its technology.

Tools like Flipper Zero can easily bypass systems that use older technology. Newer access control systems with advanced technology are generally safe from such exploits. If your access control system is outdated, it is at risk of being compromised by a Flipper Zero. Upgrading to a modern, advanced system can provide better protection against such threats.

Flipper Zero Compromise

How Can a Flipper Zero Compromise Your Access Control System?

Flipper Zero is a powerful hacking device that can exploit several vulnerabilities in access control systems.

Here are some of the techniques a hacker can use to bypass access control into your business/site:

Cloning RFID Cards

Many businesses use RFID cards for access control. The Flipper Zero can read the radio signals emitted by these cards and clone them, creating a duplicate card that can be used to gain unauthorized access. This is particularly concerning since RFID technology is widely used in 80% of access systems.


  • Use RFID systems with strong encryption protocols.
  • Add an extra layer of security, such as biometric verification.
  • Change RFID card credentials periodically to prevent unauthorized use.

Intercepting Key Fob Signals

Key fobs are standard for both vehicle and building access. The Flipper Zero can intercept the signals these fobs send to unlock doors or start engines. By capturing and replaying these signals, the device can effectively mimic the original key fob, allowing unauthorized entry.


  • Ensure that key fobs use rolling codes that change with each use.
  • Keep key fobs in signal-blocking pouches when not in use.
  • Invest in advanced key fob systems with enhanced security features.

Brute Forcing Weak Encryptions

Older access control systems often use weak encryption methods that can be easily cracked. The Flipper Zero can perform brute-force attacks to break these weak encryptions, gaining access to restricted areas. About 50% of older systems are vulnerable to this type of attack.


  • Replace outdated access control systems with those that use strong encryption.
  • Keep your access control system’s firmware up to date to protect against vulnerabilities.
  • Use complex and regularly updated passwords for all access points.

Bypassing Multi-Frequency Systems

Some advanced access control systems use multiple frequencies to enhance security. However, the Flipper Zero can also operate on various frequencies, bypassing these systems by mimicking authorized signals. This makes it a threat even to more sophisticated setups.


  • Implement systems frequently changing frequencies in a pattern known only to authorized devices.
  • Continuously monitor and analyze frequency usage for anomalies.
  • Combine multi-frequency systems with other security measures like biometric verification.

Sniffing and Replaying Signals

The Flipper Zero can sniff out wireless signals used by access control systems, such as wireless doorbells, garage doors, or smart locks. It can then replay these captured signals to gain unauthorized access.


  • Ensure that all wireless signals are encrypted.
  • Use systems that require mutual authentication between devices.
  • Keep all wireless systems up to date with the latest security patches.

Exploiting Software Vulnerabilities

Many access control systems rely on software that can have vulnerabilities. Flipper Zero can exploit these software bugs to gain unauthorized access or turn off the security system altogether.


  • Regularly audit and test your access control software for vulnerabilities.
  • Make sure that all software updates and patches are implemented as soon as they are available.
  • Deploy systems that can detect and alert suspicious activities.

What are the Potential Threats a Flipper Zero can Pose?

A flipper zero is one of the bypass tool that look harmless but can do real damage to your site/business. Though it seems harmless, it can be used for malicious activities that risk your business security system.

Let’s break down some of these potential threats:

Vehicle Theft

The Flipper Zero can intercept and replicate the signals from car key fobs. This means a person with malicious intent could unlock and start vehicles without needing the actual key. Vehicle theft poses a serious risk for businesses with company vehicles or delivery vans, leading to significant financial losses and operational disruptions.

Bypass Access Control Systems

Many businesses use RFID cards or key fobs to control access to buildings and restricted areas. The Flipper Zero can read, store, and replay these RFID signals, allowing unauthorized individuals to access secured areas. This can lead to data breaches, theft of physical assets, or even personal security risks for employees.

Disruption of Wireless Devices

Flipper Zero can access Sub-1 GHz radio frequencies. Its chipset gives it a range of 50m for targeting wireless devices and access control systems, such as garage doors, boom barriers, IoT sensors, and remote keyless systems. This could lead to unauthorized access or disruption of these systems.

Copy Credit Card Credentials

The Flipper Zero can read and mimic signals from contactless payment cards. This means it can be used to steal credit card information. Once a hacker has access to this data, they can make unauthorized transactions, leading to financial loss and a breach of customer trust.

How Can You Safeguard Your Access Control System From Flipper Zero Bypass?

Protecting your business from security threats, especially those posed by advanced tools like the Flipper Zero, requires a multi-faceted approach. Here are some important tips to help protect your access control systems and ensure the security of your business:

Upgrade Access Control System

One of the most effective ways to protect your business is to upgrade your access control system. Modern access control systems offer enhanced encryption and authentication methods that are much harder to bypass.

  • Identify weaknesses in your existing access control system.
  • Look for systems with strong encryption and robust security features.
  • Ensure the system includes anti-cloning measures.
  • Install the new system and train staff on how to use the upgraded system effectively.

Use Different Credentials

You should avoid relying solely on a single type of credential, such as RFID cards or key fobs. Instead, use a combination of credentials, such as biometric verification (fingerprints, facial recognition), PIN codes, and smart cards.

  • Implement PIN codes as an additional security layer.
  • Regularly update and rotate PIN codes to ensure security.
  • Use multiple types of credentials for an extra layer of protection (e.g., smart card + biometric verification).

Educate Your Staff and Employees About the Threat

Awareness is a key component of security. Try to educate your staff and employees about the potential threats posed by devices like the Flipper Zero. You should conduct training sessions on how these tools work and what signs to look out for.

  • Conduct sessions to inform employees about access control threats.
  • Distribute guides and brochures on recognizing and preventing security breaches.
  • Raise a culture where employees report any suspicious activities immediately.

Access Control Policies

Implement and enforce strict access control policies. Define clear rules about who has access to what areas and ensure that the team follows these rules.

  • Establish different access levels for various areas of your business.
  • Adjust policies to respond to new threats and changes in business operations.
  • Keep track of access logs and ensure that employees adhere to the policies.

Multi-Factor Authentication

Multi-factor authentication adds an extra layer of security to your access control system. It requires users to provide two or more verification methods to gain access. These could include something only they know (a password) or biometric verification (like fingerprint scanning or facial recognition).

  • Activate Multi-Factor Authentication on your access control systems.
  • Select a combination of methods, such as password + biometric verification.
  • Review and update Multi-Factor Authentication settings to maintain a high level of security.

Physical Barriers

In addition to electronic security measures, physical barriers can significantly enhance the security of the sensitive areas of your site/business. You should use sturdy doors, locks, and barriers to protect sensitive areas.

  • Determine which areas require additional physical protection.
  • Use strong doors, locks, and other physical barriers.
  • Install turnstiles and security gates that require electronic authorization and physical interaction to enhance security.

Looking for Flipper Zero Resistant Access Control Systems in Canada?

If you’re concerned about the security threats posed by tools like Flipper Zero, it may be time to upgrade to a more robust access control system. By staying informed and proactive, businesses can ensure they’re safe and ahead of the curve. A Flipper Zero can easily exploit weaknesses in access control systems, granting unwanted access to your business and causing financial and personal exposure.

Spotter Security has your back if you are searching for reliable access control systems that resist tools like Flipper Zero to secure your business in Canada. With over 20 years of experience in the security industry, Spotter Security knows the ins and outs of securing a business site from Flipper Zero hacking.

From security camera installation to access control to alarm systems and live monitoring, Spotter Security keeps you confident about your site security while providing 24/7 technical support should you ever encounter problems.

Written by : Carlo Di Leo

At the age of 24, with no experience in the security industry or any money in the bank, Carlo quit his job and started Spotter Security from his parent's basement. Founded in 2004, Spotter grew from a single man operation into a multi-million dollar security system integrator that caters to businessess and construction sites across Canada.

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