Hi All I've been doing a bit of research on RFID, in particular around Mifare / 13.56mhz cards. I'm still fairly new to this so please excuse any 'duh' moments.
I can find plenty of information in regards to 125khz cards including hooking up commercially available readers with wiegand connections (D0, D1, Vcc and Gnd connection) along with plenty of different options components.
I am wanting to use something a bit more secure than the normal 125khz cards and think what I want is Mifare cards that require sector-based authentication keys before releasing the card's data.
I can find information about MFRC522 based arduino gear which I have ordered to test out, but I want to use something commercially available and easy to install etc. similar to the below: http://www.ebay.com.au/itm/221515876169?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
These readers claim to have a wiegand style interface (D0/D1) pins but I'm not sure if this is going to work as all the libraries seem to be based on SPI and I cannot find any libraries, adapters/converters or anything that appear to work with this style of reader.
Basically I want to be able to write some cards with a custom key and then (hopefully easily - I'm still new to Arduino etc.) use a reader similar to the ebay job above to read them using something similar to this: http://forum.arduino.cc/index.php?topic=141000.0
This is so that I can have cards that are at least somewhat secure and protected from (at least easy) cloning so that not just anyone can read them.
Can anyone point me in the right direction? Please note that I'm still quite new to this :)