RFID sniffer

http://rfid.marcboon.com/#category2

RFID sniffer

About this project

RFID is everywhere. Use the easy to build RFID sniffer to find out if objects are tagged.
The RFID sniffer is a simple analog electronic circuit which can detect the presence of 13.56 MHz RFID tags. 

Arduino-based RFID reader

http://www.tigoe.com/pcomp/code/PHP/347/

RFID Door Lock

http://www.balua.org/RFID_lock.html

Tutorial 12 for Arduino: RFID Card Reading

http://www.jeremyblum.com/2011/07/08/tutorial-12-for-arduino-rfid-card-reading/

http://www.jeremyblum.com/2011/04/05/tutorial-11-for-arduino-sd-cards-and-datalogging/

How to get started with the Mifare MF522-AN and Arduino

http://www.grantgibson.co.uk/blog/2012/04/how-to-get-started-with-the-mifare-mf522-an-and-arduino/

MICROSD 2GB MODULE FOR ARDUINO

http://blushingboy.net/p/SDuFAT/

http://www.google.co.kr/#q=rfid+mifare+arduino&hl=ko&newwindow=1&prmd=imvnsul&ei=sMwjUI-oJ4TKrAe-_oC4AQ&start=0&sa=N&bav=on.2,or.r_gc.r_pw.r_qf.&fp=c5adffb9e0ad5f11&biw=1010&bih=867