Last updated on April 9, 2026
RFID Authenticators are contactless devices that a user presents near an RFID reader during the authentication process. These authenticators can take the form of cards, key fobs, wristbands, or embedded chips in wearables. RFID authentication relies on radio-frequency communication between the authenticator and the reader to verify identity.
A user who wants to log in to an application integrated with Rublon provides their login and password in the first step of authentication. In the second step, they are asked to connect a compatible RFID reader and then hold their RFID authenticator to the reader. This process confirms the user’s identity, and the user gains access to their account. It’s very simple.
RFID Security
RFID security depends not only on the authentication system but also on the technology of the card itself. Some legacy RFID cards are known to offer limited resistance to cloning and spoofing, which is why card choice matters in security-sensitive environments.
For this reason, we strongly discourage the use of MIFARE Classic cards in environments with elevated security requirements. Customers who need stronger protection against cloning should use more secure authentication methods like FIDO.
Rublon MFA implements safeguards designed to reduce the effectiveness of duplicated RFID credentials. Once an RFID authenticator is assigned to a user, card usage is handled in a way that helps prevent an original card and its clone from being used interchangeably as independent credentials.
List of Supported RFID Authenticators
- Mifare Classic 1K
- MIFARE+UNIQUE 1K
List of Supported RFID Readers
- ACS ACR1252U-M1
- ACS ACR122U-A9
- ACS ACR1552U-M1
- ACS ACR1552U-MF
- ACS ACR1281U-C1
- HID OMNIKEY 5022 CL
- HID OMNIKEY 5422
- Identiv uTrust 3700 F CL