Hi guys,
I'm working with RFID-RC522 sensor, I'm trying to change the password read / write, but I really do not know where I can change or as default .For the FFFFFF comes, I would like to change it so that no cloned me cards .
I downloaded the library device and I'm working with her but I get to the place where modify the key to writing reading.
Someone has used this device (RFID-RC522), and I could indicate how to change this key ??
It is not clear to me exactly what you want, but I think you are asking about changing the key returned from an RFID tag. Some can be re-written, but unless you are using a key with built in encoding (think Keyloc with the rolling code/encryption), if someone can read the card, they can clone it. Even the rolling code using encryption has been hacked (see the June 2016 issue of Circuit Cellar). A simple RFID tag returns the same code each time it is read - that means someone can read your card and create one of their own that returns the same code. One thing that helps is if you time control access as well as the RFID so that your card for example is only valid during your normal access times.
Thanks , I explain in more detail what I do.
Using an RFID - RC522 module,
with a series of cards ,
in the library of this device there are several examples to read / write data to the RFID card, module and sectors.
The key to read / write data on the cards is the same ( FF FF FF FF FF FF ) , I'm looking for all the examples , libraries etc ... to change that key , so that the device does not read cards I do not program .
Someone has worked with this device can help me ??
Someone knows how to make the change of key in an RFID module ??
Thank you.