There is no need to doubt the benefits of Radio Frequency Identification (RFID) in helping change many work sectors. However, what you need to know is that alongside the many benefits it produces, RFID also comes with certain drawbacks worth understanding before you adopt it.
Every existing technology has advantages and disadvantages, and RFID is no different. RFID systems are used across various industrial sectors such as construction, engineering, the chemical industry, manufacturing, retail, and more; the specific pros and cons can vary depending on how the technology is applied.
This article discusses both the general advantages and disadvantages of RFID technology. The discussion will focus specifically on its application in the most common uses: access control systems and key cards.
General Advantages of RFID
Before discussing specific uses RFID in access control and key systems, you need to understand the general advantages of RFID. Here are some general advantages offered across various industries:
- Fast bulk data capture: RFID readers can detect and read multiple tags simultaneously without a clear line of sight, making the process much faster.
- Automation and reduction of human error: RFID automatically captures data as tagged items pass through the reader, reducing reliance on manual data entry, which carries a risk of human error.
- Durability and reusability: Compared to barcodes, most RFID tags are more durable, making them a practical choice for long-term tracking.
- Longer read range: This does depend on the type of tag. UHF RFID tags can be read from a distance of several meters.
Common Limitations of RFID
In general, RFID also has several limitations. Here are some broader considerations:
- Higher upfront costs: RFID tags and readers are generally more expensive than barcode systems.
- Signal interference: Metal surfaces and liquids can interfere with RFID signals, potentially reducing reading accuracy in certain environments.
- Privacy and data security concerns: RFID tags can be read without direct contact. This can be exploited if someone uses the technology without the tag holder’s knowledge.
- Complex integration: Implementing RFID by integrating it into warehouse management software adds complexity and extends implementation time.
The Advantages and Disadvantages of RFID in Access Control Systems
One of the most common day-to-day applications of RFID is in access control and key card systems, used in offices, apartments, and other secured facilities. Here’s a closer look at the specific advantages and disadvantages in this particular use case.
Advantages of RFID in Access Control
Security
Data in RFID key card systems is usually secure because specialized equipment is needed to read the data, which helps keep the lock system protected against casual tampering.
Convenience
It only takes a fraction of a second to hold an RFID key card near a reader to unlock the security system. The process is fast and straightforward.
Size
RFID key cards are practical in size, similar to a regular bank card, making them easy to carry and store. Users are less likely to forget these cards when heading to places that require access.
Variety of fittings
RFID locks come in a range of designs and spindle lengths that can be adapted to different types of doors and furniture, making them suitable for a wide range of businesses and applications.
Master card function
A single RFID key card can be programmed to work across different types of locks. This saves users from having to carry multiple cards for different doors, while still allowing each card to have its own independent access permissions.
Disadvantages of RFID in Access Control
Although RFID access control offers real advantages, it comes with some specific drawbacks as well:
Lost key card
Unlike traditional keys, losing or misplacing a key card can leave you with the hassle of figuring out how to regain access, or having to deactivate and reissue a new card.
Hacking risk
RFID access systems can potentially be compromised by someone with the technical know-how to intercept or clone card signals, which raises security concerns if the system isn’t properly secured.
Power dependency
Electronic RFID key card systems typically don’t work during power outages, which can leave some locks either blocked or left open, creating uncertainty for users who rely on the system.
Costly and complex installation
RFID access control installation tends to be more expensive and complex than a traditional lock. The setup requires the system to be connected to a secure backend that can be accessed, controlled, and logged via computer.
Ongoing system maintenance
Some RFID access systems that aren’t connected to the internet may require manual adjustments over time, such as periodic clock syncing for time-based access rules, which adds a small ongoing maintenance task for administrators.
How to Overcome the Disadvantages of RFID
RFID does have unavoidable limitations. However, these can be mitigated or managed with the right approach.
Here are some steps you can take:
- Treat it as an investment: An RFID investment will pay off over time, especially when implemented on a large scale, resulting in long-term savings.
- Choose the frequency and tag placement: This can be done by working with vendors to minimize signal interference.
- Use encrypted tags and clear data handling policies: For applications involving personal information, this can help address privacy concerns.
Like any other technology, RFID, which offers numerous benefits across various sectors, is not without its drawbacks. These drawbacks depend on how the technology is used and implemented.
Looking ahead, RFID technology is expected to continue evolving. These advancements will help reduce tag costs, improve signal reliability, and enhance built-in security.
