How Does RFID Access Control Work?
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How Does RFID Access Control Work?

Views: 1     Author: Site Editor     Publish Time: 2023-03-23      Origin: Site


The RFID access control system allows for the determination of who enters or leaves specific premises at any given time. The system identifies an individual, authenticates their details, and grants access after verification.

Building access is restricted to specific individuals. An RFID card, RFID key fob, RFID wristband, or any other RFID tag containing their verification information must be carried by these individuals.

Don't worry if that sounds confusing! An overview of RFID access control systems is provided in this article.

RFID Access Control Systems: What are they?

RFID stands for Radio Frequency Identification. Radio waves are used to transmit information in this system.

RFID systems must include a reader and a tag. You should be able to write unique details about an individual on the tag if it is writable and readable.

You can also use a single tag for different individuals at different times with the write/read attribute. In the event that an employee resigns, you can easily erase their data and write fresh data for the new employee.

In order for an RFID access system to function optimally, it must contain all of the following components:

RFID Access Control System Components

  • It is the server. A whitelist (a list of all individuals allowed access to a given premise) is controlled by this component. Management controls the system by typing/saving credentials for all expected visitors.

  • A credential. An organization can use these details to identify visitors/employees. Unique PINs, Identity Card Numbers, and Unique Codes, among others, can be used. Credentials are not standardized, and data to be used is determined solely by management.

  • Tags with RFID technology. Credentials are stored in this component. Tag details must match those on the whitelist exactly. If the data is copied incorrectly, the tag will be rejected by the readers. Cards, key fobs, bracelets, and wristbands can be attached to the tag.

  • Reader for RFID tags. RFID readers must be strategically placed to scan RFID tags. The tagged user will be allowed access if the information stored in the tag matches that in the database.

  • The controller. This component compares the RFID reader data with the whitelist information. The door lock opens only if the credentials match.

  • Lock on the door. A RFID door lock system is fully automated and is controlled by a controller. Open/close signals will be sent by the control panel. Depending on the type of signal received, the door will either open or remain closed.

Although it may seem like a long process, it is lightning-fast! Identification takes only a few seconds!

RFID Access Control: How it Works

The functionality of an RFID access control system can be simplified in two simple steps:

  • Presentation of data

  • Authorization and authentication of data

Presentation of data

Access control begins with this phase. Data must be presented to the RFID reader for analysis.

Data can be presented in a variety of ways depending on the management's needs and preferences. The encoded data must, however, be unique to each employee. Duplication of data will result in errors that may delay admission.

The following steps are followed when presenting data:

  • The Control System needs to be updated with new data. RFID access control systems are controlled by a control system. It is the organization's memory. In it, all the data necessary for admission to the premises is stored. Credentials of expected visitors must be updated by the management.

  • RFID tag writing. Once the management decides which data combination to use in the control system, it must transfer the exact data to an RFID tag. An object, such as a card, key fob, or badge, is attached to the tag.

  • Presentation of RFID cards. An RFID card (or any other object containing a unique RFID tag) is required for the expected visitor.

Most RFID control systems are highly automated. There is unlikely to be an assistant at the door. RFID readers, however, detect your RFID tag immediately and open the door for you to enter without restriction.

Authorization of data

RFID control systems reach this stage. Data analysis and authentication are involved. A memory containing details of all expected visitors/employees is located on the control panel.

The following sequence of events occurs when an individual approaches the door:

  • RFID tags are powered. Electromagnetic signals are released by the RFID reader, which is usually found at the door. Upon receiving these signals, the tag is powered and sends the stored information to the reader.

  • Data is received by an RFID reader. An antenna transmits and receives data from the reader. The reader sends the data to the control panel for analysis as soon as it receives it.

  • Comparison of data. Data from the reader is scanned through the control panel's database when it is received.The door will automatically open if the data sent matches any data on the whitelist.

The system will not function if any of these actions are interrupted. If you are unable to gain access despite having a valid RFID card, you will need to speak with management. It is possible for the wrong data to be copied to the card or for the system to malfunction.

RFID Access Control System Benefits and Drawbacks

An organization can benefit greatly from RFID access control systems in terms of security. Access to the premises is restricted to authorized individuals.

An organization can also assign specific roles to specific employees using it. Employees will be accountable for every action they take on duty, which makes preventing data breaches easier.

RFID cards are also durable. Due to their ability to withstand harsh environments, they are more cost-effective than other alternatives such as barcodes.

RFID access systems, however, also have several drawbacks. It is possible, for instance, for the system to be hacked, resulting in the leakage of private information. If hackers obtain details about the card, they can also be cloned.Cybercriminals do not have to worry about using RFID tags since they can easily be deactivated.

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