Our Online Store have the new products: RFID antenna board. Currently it can work with JC10M24R and JCOP4 card chips.
Compared with normal cards, the antenna board module has a smaller size and fixed holes, which is easy to integrate in the IOT(Internet Of Things) project.

KeyA and KeyB and how to protect the contacless card from cloning?

card reader

Moderator: horse dream

Posts: 1
Joined: Wed Jun 05, 2019 12:18 pm
Points :14

KeyA and KeyB and how to protect the contacless card from cloning?

Post by djamelo » Wed Jun 05, 2019 12:29 pm

Hi all,
I have a Pos terminal that can write into contactless mifare card and read from contactless mifare card. For writing a Key A I use;
cCard_.loadKey(aKey, eKeyStore);
eKeyStore = 0;
aKey[6] = {“FF”,”FF”,”FF”,”FF”,”FF”,”FF”}

My access bits KeyA is in Sector 1 Block 3. Which means trailer block 7. Am I right?

If I am correct there are 16 sector. I already have my own Key other than “FFFFFFFFFFFF”. Example;

For Sector 0 Key A:
My_Key = “8fd0a4f256e9”;
My_Data1 = “2153”;
My_Data2 = “es56fg87p4f2”;
My_Data3 = “5852337644220001”;

In Block Number 0, I have My_Data3, in block number 1, I have My_Data2 and in block number 2, I have My_Data1.

I want to understand the how to set my key for Key A and Key B?
So when I say Block number 3, Key Store number 0 is it equal to “8f” or equal to “8fd0a4f256e9”?

I need to understand the key option so I can encrypt my keys so only my Pos terminal can access it.

CardNo: “5852337644220001”
CardPass: “es56fg87p4f2”
CardPin: “2153”
KeyA: “8fd0a4f256e9”

1) Which Sector do I have to use to store my data for above example? Can I use Sector 1?
2) In above table example how to I write My_Data1? Should I use Sector 1, Block 2, StoreNum 0, StoreNum1, StoreNum2, StoreNum3?
3) Can I store a data “2153” in sectore 1, block 2, storenum 0?

What type encryption do I have to use to protect my data from cloning?

I didn't find the right solution from the internet.
https://www.mifare.net/support/forum/to ... m-cloning/

Any help will be appreciated.
Thank you.

Who is online

Users browsing this forum: No registered users and 10 guests

JavaCard OS : Disclaimer