NFC Mobile credential

Navigating Security Vulnerabilities: The Shift from 125KHz Prox Cards to Mobile NFC and 13.56MHz Credentials

In the ever-evolving landscape of security technology, staying abreast of the latest trends and threats is crucial for safeguarding sensitive information and access points. One such area of concern has been the use of 125KHz proximity (prox) cards, a once-standard in access control systems. However, these cards are increasingly vulnerable to security breaches, primarily through cloning. This blog delves into the weaknesses of 125KHz prox cards and advocates for a shift towards more secure alternatives, such as Mobile Near Field Communication (NFC) and 13.56MHz credentials.

The Vulnerability of 125KHz Prox Cards

The 125KHz prox cards operate on a low-frequency band and are widely used for physical access control. Their popularity stems from their simplicity and cost-effectiveness. However, these advantages are overshadowed by significant security flaws:

  1. Easy to Clone: These cards transmit unencrypted data, which can be easily intercepted and cloned using readily available tools. This makes it simple for unauthorized individuals to gain access to secure areas.
  2. Lack of Encryption: The lack of encryption means the data on the card can be read by any device operating on the same frequency.
  3. Static Information: The information on these cards is static, meaning it doesn’t change with each interaction, making it easier to duplicate

Why Upgrade to Mobile NFC and 13.56MHz Credentials?

In contrast, advanced technologies like Mobile NFC and 13.56MHz credentials offer robust security features that address the vulnerabilities of 125KHz prox cards.

Mobile NFC (Near Field Communication)

    1. Enhanced Security: Mobile NFC enables encrypted communication between the card reader and the mobile device, significantly reducing the risk of data interception and cloning.
    2. Dynamic Authentication: It often uses dynamic authentication methods, which change with each transaction, adding an extra layer of security.
    3. Convenience: Using mobile devices for access control is highly convenient, reducing the need for physical cards.
    4. Integration with Biometric Verification: NFC can be integrated with biometric verification methods on mobile devices, providing multi-factor authentication.

13.56MHz Credentials

    1. High-Frequency Encryption: Operating at a higher frequency, these credentials offer more robust encryption, making unauthorized access considerably more challenging.
    2. Smart Card Technology: These cards can store more data and support advanced features like biometric data storage, PINs, and digital signatures.
    3. Mutual Authentication: They often involve mutual authentication processes, ensuring both the card and reader are legitimate before access is granted.

Implementing the Upgrade

Upgrading to Mobile NFC or 13.56MHz technologies involves both hardware and software changes. Organizations need to:

  1. Assess Current Infrastructure: Evaluate the existing access control systems and determine the feasibility of integration with NFC or 13.56MHz technologies.
  2. Plan for Interoperability: Ensure the new system is compatible with other security systems in use.
  3. Employee Training: Educate employees about the new system, focusing on the use and benefits of upgraded technology.
  4. Phased Implementation: Consider a phased approach to avoid disruptions and allow for troubleshooting.


In the realm of access control and data security, complacency can lead to significant vulnerabilities. The transition from 125KHz prox cards to more secure technologies like Mobile NFC and 13.56MHz credentials is not just an upgrade; it’s a necessary step towards ensuring the integrity and safety of secure areas and data. By embracing these advanced technologies, organizations can significantly mitigate the risks associated with unauthorized access and data breaches, ensuring a safer and more secure future.

Contact Systems Integrations today for a risk-free evaluation of your current card access architecture. Our team of experts is dedicated to ensuring the security and efficiency of your access control systems. With the evolving threats and vulnerabilities in security technology, it’s crucial to stay ahead. We specialize in assessing and upgrading access control systems to more secure and advanced technologies like Mobile NFC and 13.56MHz credentials.

Don’t let outdated technology compromise your security. Reach out to us, and let’s work together to safeguard your facilities and data with state-of-the-art access control solutions.

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