RFID or proximity cards don't require the swiping motion. They use radio frequencies to enable access from a programmed short distance (hence the term proximity). RFID cards belong to the group of contactless cards. Usually for proximity cards, the user will need to almost touch the RFID reader to unlock the door.

Hotel RFID (Radio Frequency Identification) keys work using electromagnetic fields to communicate data between a small chip in the card and a reader on the door lock. Inside the plastic key card is a tiny antenna and an integrated circuit (the tag). When you hold the card near the door's reader, the reader emits a low-power radio signal that "wakes up" the chip in the card. The card then transmits a unique, encrypted code back to the reader. The lock's internal computer checks this code against the room's current authorization data (which was programmed during your check-in); if the code matches and the date/time is within your stay's window, the door unlocks. In 2026, this technology is much more secure than the old "mag-stripe" cards because the data is encrypted and cannot be easily demagnetized by your phone or wallet. Furthermore, hotels can remotely deactivate a lost RFID card or update it to work for a different room without the guest needing to go back to the front desk, making the system both secure and highly efficient for large resorts.