QT Development with DESfire EV1

[Mark Lorenz Ong]

Hi,

I just bought DESfire EV1 (MF3ICD81) and here's the list of my question(see below). Basic guide or documentation to support my questions if its possible would do. Thanks in advance.

1. How to know if the DESfire is blank?
2. How to access it?
3. How to read and write data to it?
4. How to add encryption/security to it?
5. If the DESfire will return hexadecimal number, how would I know the meaning of it?

Again, Thanks!

---

+ 0  |  - 0

[Mark Lorenz Ong]

Another list of questions below. Thanks again. I'm using a low end tablet with ACR1252U with it.

6. If I have blank cards, how can I write data with it?
7. If I have blank cards, how can I add keys to it?

Again, thanks.

---

+ 0  |  - 0

[TapLinx Support]

Hi Mark,

I am very sorry, but this questions cannot be answered here in the forum.

You need more investigations about the architecture of the MIFARE DESFire EV1/2, about security mechanisms and algorithms and of the used readers. I recommend to start your investigations with the reader device ACR1252U. Download the user manual and check the available commands.

Kind regards,
The TapLinx Team

---

+ 1  |  - 0

[Mark Lorenz Ong]

Hi,

I'm already doing that. Can you give me example of ISO 7816-4 read and write functions?

---

+ 0  |  - 0

[TapLinx Support]

Hi Mark,

ISO 7816-4 is the standard for contact cards. If you want to communicate with MIFARE products, you need to know the standard for contactless cards: ISO 14443.

The TapLinx Team

---

+ 0  |  - 0

[Dinesh Thanth]

Can We Write Protected MIFARE Classic 1K Card Memory ??
MIFARE Classic 1K Card Memory can be readable and writable only by me.Is it possible to Protected by password ??
If possible then give me some hint about it.

---

+ 0  |  - 0

[TapLinx Support]

Hi Dinesh,

Please have a look to the datasheet:

http://www.nxp.com/documents/data_sheet/MF1S50YYX_V1.pdf

You will see that the memory space is divided in sectors and blocks. Each sector has its own so called “sector trailer”. In the sector trailer the access permission including two passwords are set.

If someone has used a sector and protect this sector with one of the passwords, you can read or write only, if you know the password.

Kind regards,
The TapLinx Team

---

+ 0  |  - 0

[Author]

Posts