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How to Hack an RFID Door Lock

This article is a collaborative effort, crafted and edited by a team of dedicated professionals.

Contributors: Muhammad Baballe Ahmad, Mehmet Cavas, Sudhir Chitnis, and Zhen-ya Liu.

✓ Verified & Tested Information

Learn how to hack an RFID door lock by following these simple steps. With a little know-how, you can easily bypass these locks.


Radio-Frequency Identification (RFID) door locks are becoming increasingly commonplace in commercial building security systems. These locks can offer a greater degree of access control-since they contain information that can be used to remotely identify people, giving permission or refusal to pass through doors. However, as with any technology, there is a risk that it can be hacked. Understanding how these systems work and the vulnerabilities which may exist in them is critical for preventing unauthorized access. This guide takes you through the basics of RFID door locks, how they operate, and what you need to know to protect them from being compromised.

What is RFID

RFID stands for Radio-Frequency Identification and is a technology used in many forms of security systems. In an RFID system, an RFID tag which is usually embedded in a card or key fob is used to identify an individual. When a card is scanned, the RFID reader sends a signal to the door lock to unlock it. In this article, we will discuss the basics of what RFID is and how to use it to hack an RFID door lock.

Types of RFID

Radio Frequency Identification (RFID) is a technology commonly used in items such as credit cards and access cards for secure entry. It works by transmitting data from an RFID chip through radio signals to a reader which interprets the data embedded within it. There are two main types of RFID chips: active and passive.

Active RFID chips contain an onboard battery which powers them, making them constantly broadcast their information. They can run up to 500 feet, allowing you to use them remotely and over long distances. They are also more expensive and require more maintenance than passive tags, since they need to be regularly recharged or replaced.

Passive RFID chips contain no power source of their own, they are activated when an external reader is brought near and reads the encoded data stored on the chip’s memory card. Since they require no power to operate, these tags can have much longer lifespans than active tags without needing frequent maintenance or replacement. Passive chips have a shorter range of only about 30 feet but are easier to maintain and less expensive than their active counterparts.

How RFID works

Radio-Frequency Identification (RFID) technology is used in a wide range of different types of applications, including access control and keyless entry systems. The technology works by using small radio-frequency identification tags, or RFID tags, that emit a unique identification number when they come within a certain proximity of an RFID reader.

The RFID reader can detect this ID code from up to several feet away, depending on the specific system. Once the reader receives the ID code from an RFID tag, it can transmit that information to another device and trigger an action – such as unlocking a door lock – based on that data.

RFID systems can use active or passive tags. Active tags are powered by their own battery and have longer read ranges than passive tags, which use the energy radiated by the RFID reader itself to power their transmissions.

Each RFID system also uses its own frequency band – from low frequency (LF), high frequency (HF), Ultra High Frequency (UHF), to microwave bands – depending on its range requirements and type of application. Many modern door locks utilize UHF technology for more accurate reading of ID codes at longer distances.

Hacking an RFID Door Lock

RFID locks are an increasingly popular way to secure doors and entryways. These locks are made to be electronic, and therefore can be vulnerable to hacking – meaning, an individual with malicious intent can use their tech knowledge to gain access to the lock without the use of a key or access code. This section will cover the different ways of hacking an RFID Door Lock.

Acquiring the Lock

In order to successfully hack an RFID door lock, you must first find one that can be safely used for experimentation. There are several types of locks available and each has its own characteristics which will influence the type of hacking technique that you need to use. When looking for a lock to use, it’s important to purchase one that is rated as “secure” or “anti-theft” by an independent testing agency.

Once you have acquired the lock, the next step is to test it and make sure it is functional before you attempt any hacking techniques. Some notable tests include verifying the read/write capabilities, detecting any security flaws or vulnerabilities, and testing for physical access points. Once you have completed these tests, then you can begin studying how the system works in order to develop your own hacking strategy.

Disassembling the Lock

For most RFID door locks, you’ll need to disassemble the lock in order to gain access to the interior components. In general, you should remove any screws that are visible and separate the two halves of the lock. Once disassembled, make sure you have a safe surface to store all of the small parts that may come out when you open up your lock. Be sure to exercise caution when working with any device containing sensitive electronics.

In many cases, there is a control board with the actual reader included on it. Find this board and remove it from the housing. This is where most of your hacking efforts will take place. The control board will have a number of connectors for data and power as well as signal lines that allow communication between various components inside and outside the lock. You should be able to identify these points with relative ease as they will generally be clearly marked on the reader’s instruction manual or label.

You may also find some other hardware components connected directly or indirectly to the reader such as buttons or LEDs that indicate status notifications or provide user feedback – these are generally classified as user interface components and can usually be hacked without difficulty depending on their complexity level. Once you have identified all these hardware and software features present inside your RFID door lock, you can start researching exploitation techniques designed specifically for this kind of system.

Finding the RFID Reader

Door locks equipped with RFID technology are becoming increasingly popular. It allows the user to gain access to a building with the simple wave of an authorized card, making it easy and convenient for those who are authorized to enter. But these systems also present potential security risks, which is why hackers have targeted this type of lock. In order to take advantage of these available security vulnerabilities and hack an RFID door lock, you must first locate the RFID reader installed inside the door’s lock mechanism.

The RFID reader will typically be mounted either within the handle or on the exterior of a door frame nearby. It is generally about 1 inch in length and can either be white or black in color. The most commonly used readers are made by Honeywell and HID Global, but other brands such as Motorola can also be used in these systems. Once you have identified the reader installed in the system, you can then focus on compromising its security features and making use of available attack strategies such as replay attacks or physical tampering methods to gain unauthorized access.

Cloning the RFID Tag

One of the more interesting and complex methods for hacking an RFID door lock is called cloning. This process involves creating a digital copy of the data stored on a legitimate RFID tag and writing it to a new RFID tag or card. Cloning requires certain hardware components, such as an RFID reader/writer device, a special type of blank RFID tag or card, and specific software designed to interact with this hardware.

Once the correct hardware and software is obtained, the cloning process begins by reading the signals emitted by a legitimate RFID tag that can be used for access. This data is then written to a new blank RFID tag or card, effectively creating an exact duplicate with all of the same access rights as its legitimate counterpart. Using this method it’s possible to gain access to virtually any area protected by an RFID door lock without having to obtain physical access to the original tag or card.

Reassembling the Lock

Now that you have the circuit board removed and all the parts identified, it’s time to start reassembling the lock so that you can program it. First, gently place the circuit board back inside of the door lock and secure it. Make sure none of the mounting tabs are overextended — if they are pushed too far, they may break off.

Next, begin soldering any disconnected RFID antenna pins back onto their appropriate terminals on the circuit board. In most cases, although small differences will occur among brands and models of RFID locks, there are usually two different types of pins — an “in” pin for when cards/fobs are scanned in to gain access, and an “out” pin which must be touched to scan out if desired.

Once those connections are soldered securely in place, take your NFC card or FOB and test them out! It’s a good idea to pull up your device’s settings page while doing this so that you can make sure its connection is validated. Once both of these elements have been verified, you now have a fully functioning RFID door lock at your disposal! Congratulations on hacking your own door lock!


RFID door locks are becoming more popular in homes and businesses. This increased popularity also means that there is a greater risk of hackers obtaining access to your property through using RFID hacking techniques. To protect yourself and your property from unauthorised access, it is important to review the security measures you have in place and take necessary steps to further secure your door locks. While all locks can be broken, your best defense against an attack is to ensure that you have the correct hardware, system settings, and monitoring capability in place. This will reduce the risk of infiltration and give you peace of mind that your valuable items are safe behind a secure lock system.

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