2017 Announcement: I am happy to announce new project https://github.com/omersiar/esp-rfid ESP-RFID Access Control with ESP8266
July/2014 Omer Siar Baysal
Arduino RFID Access Control using a RC522 RFID reader with SPI interface on your Arduino
For now there is 3 version of Access Control
EEPROM Version
Storing data on EEPROM, Stable, Basic System
SD Version - Work In Progress
Storing data on SD Card, more features will be added like USER management Tracking with Real Time Clock
Embedded System - Work In Progress
Complete RFID solution with Networked Web Interface USER management Tracking with Real Time Clock Cross-Platform Management Application
More info on: http://forum.arduino.cc/index.php?topic=256260