Radio Frequency Identification (RFID) cards are used in many industries. RFID technology enables tracking, identification and access control. They contain an RFID chip that contains all the data required for specific applications. RFID cards use different frequency bands: low-frequency, high-frequency and ultra-high frequency. Each card's application is determined by its frequency band. Let's take a look at everything you need to know about RFID access credentials and how they can improve security.

Understanding RFID cards technology for access control

RFID cards are contactless cards that contain an RFID chip. The chip is used to store all the necessary information. The data is transmitted by radio waves and is read by an RFID reader. The reader decodes the data and transmits it to built-in software for analysis.

How RFID cards work in access control

RFID card technology is used for access control because of its unique identification. The systems work by placing a reader next to a door that detects the ID transmitted by the RFID card. The door will only be unlocked if there's a match between the RFID card and the authorisation in the access control system.

Types of RFID cards: active, passive, and semi-passive

Depending on the type of operation and the frequency strength of the embedded RFID tag, RFID cards can be classified.

Key features of active, passive, and semi-passive RFID cards

There are three types of RFID cards: active, passive and semi-passive. Let's compare their key features.

Active RFID cards

These cards have a battery-powered tag that continuously emits signals. They are not dependent on the presence of an RFID reader to transmit and receive signals. Typically, they are used to track high-value assets in high-speed environments. They have a longer read range than passive cards.

Passive RFID cards

Passive RFID cards, on the other hand, do not have an internal power source. They rely on the electromagnetic energy generated and transmitted by an RFID reader. The tags are only functional when an RFID reader is inserted. The cards are mainly used for functions such as access control, supply chain management and smart labelling.

Semi-passive RFID cards

These cards have an integrated circuit, an antenna and a battery. The main difference with the other two is that semi-passive ones do not have an integrated transmitter. The cards have a limited reading range compared to active cards. The inclusion of a battery allows more fictionality to be added to the card: real-time tracking, sensors and audible alerts.

Choosing the right RFID card type for your needs

To choose the right RFID card, you need to understand your needs. They are three points to consider:

The software

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Take stock of the existing systems that you use and the functionality you want from the RFID software.

The application

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Think about the maximum distance that you need between the card and the reader and the environmental conditions in which it will operate..

The reader

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Consider whether you need the reader to be fixed or whether workers could use a smartphone or a tablet to scan.

Key advantages of RFID in access control systems

As mentioned above, RFID cards contain an RFID chip. This chip contains data that uniquely identifies the card. The data can be transmitted via radio waves to an RFID reader. Let's look at the key benefits of an RFID card.

Enhancing safety with RFID: key benefits

• Automated control. The use of RFID access cards eliminates the risk of human error. Unlike humans, they can never give access to the wrong people and are not susceptible to artificial attacks.
• Remote management. RFID access cards allow you to access all data from a central source. You can manage multiple departments.
• Collect data. They can collect and store data. You can analyse all the comings and goings of employees, the time, the day and anyone who has access.

Different of types of access control RFID cards

There are two main types of RFID access card.

• RFID smart cards: The main benefit is that they provide security and faster access control. They can communicate with the RFID card reader. They have with built-in processors that help authenticate the card. RFID smart cards enhance security by deleting the code immediately after use.
• RFID proximity cards: They provide unidirectional transmission of data from the card to the reader. They are easy to use - you simply scan the card to transmit the data.

Addressing security concerns with RFID cards

RFID access control cards use highly advanced encryption technology. This technology ensures that the signal cannot be intercepted or copied during transmission. RFID cards have an embedded security chip designed to provide multi-level protection and industry-leading security.

Future trends in RFID access control technology

There are many other applications that will emerge in the near future as RFID develops.

Emerging technologies enhancing RFID safety

Emerging technologies to enhance RFID security will include new payment integration, the use of AI and biometric cards. New payment integration will provide an even higher level of security for both customers and industries. The embedded tags in RFID cards will further reduce fraud and theft. AI will also play a role in improving the security of RFID, enabling fault detection and predictive maintenance by analysing sensor data and ensuring that access points or RFID readers are functional and secure.

Pre-studies are being conducted to evaluate the possibility of developing biometric cards for access control. They could be useful for customers who require a high level of security for personal identification. It will be necessary to use a biometric card for access control using on-card biometric fingerprint identification. This ensures that the card is used by the correct owner for identification purposes.

Contact us for expert advice on RFID

If you have any further questions, please do not hesitate to contact us. Brady's experts can help you choose the RFID cards and equipment your business needs.