How HID prox cards and MIFARE cards work for office MFP login
Quick definition
HID Prox and MIFARE are two different RFID card technologies used for office badge-based MFP authentication. HID Prox uses 125 kHz low-frequency RF with simple card serial number reading. MIFARE uses 13.56 MHz high-frequency RF with encrypted memory storage. MFP card readers typically support one technology but not both; choose based on the card system the office already uses.
Technical comparison
| Property | HID Prox | MIFARE |
|---|---|---|
| Frequency | 125 kHz (LF) | 13.56 MHz (HF) |
| Read range | 5-15 cm | 2-10 cm |
| Security | Serial number only | Encrypted memory blocks |
| Card cost | Lower | Slightly higher |
| Typical use | Building access, legacy systems | Modern transit, payments, building access |
| Card cloning resistance | Low (serial easily cloned) | High (encrypted blocks resist cloning) |
Why the choice matters
The MFP card reader must match the card technology the office already deploys. If the building uses HID Prox cards for door access, the MFP reader needs HID Prox support to read those cards. If the office uses MIFARE for staff badges, the MFP reader needs MIFARE support. Mixing technologies requires either issuing additional cards per technology or upgrading the broader card system.
The migration trend
The industry has been migrating from HID Prox to MIFARE-class technologies (MIFARE DESFire specifically) for security reasons. HID Prox card cloning is well-documented and the technology no longer meets modern security expectations. New office deployments typically choose MIFARE DESFire or comparable HF technologies. Offices on existing HID Prox infrastructure typically continue HID until a broader card system refresh justifies migration.
Other RFID technologies for MFP login
Beyond HID Prox and MIFARE, MFP readers may support iCLASS (HID's more secure HF technology), DESFire EV2 / EV3 (MIFARE's higher-security variants), and NFC (smartphone-based authentication). Each requires specific reader support. Verify the reader's compatibility list against the office's card inventory before procurement.