Key Card – Definition and Use in Access Systems
A key card is an RFID-based access medium – used for hotel rooms, offices, lockers and industrial access points.
How a key card works
A key card is a contactless access medium in credit card format with an embedded RFID chip. It communicates wirelessly with a reader and opens doors, lockers or turnstiles. The mechanical key is replaced by a digital credential.
If lost, the card is disabled centrally – no lock swap required. Permissions can be limited by time and location.
Typical use cases
- Hotel room access and elevator control
- Employee badges for office and production
- Gym and swimming pool lockers
- Coworking spaces with daily or monthly access
Frequently Asked Questions
Can a key card be copied?
Modern encrypted cards (MIFARE DESFire, LEGIC advant) are practically impossible to copy. Old systems (MIFARE Classic) can be cloned.
How many cards can be managed?
Any number. The management system, not the reader, is the limit.
Do key cards work with smartphones?
Yes. Many systems can be operated in parallel via NFC on a smartphone.