MIFARE DesFire EV1 Work Flow — Authentication Method and Date

[hdou]

I'm new to the area PCSC programming.
I use C++, WinAPI and APDU for data exchange with RFID card.

for example, i had a programm for Mifare Classic 1K:
// SCardEstablishContext
// SCardListReaders (PICC)
// SCardConnect
// SCardTransmit

i can get uid.
i can set the session key.

i can read or write from/in the card(1k classic) {// loop
authentication with the 4th sector
I read or write data from/in other 3 sector
}// loop end

today i had a new card, "MIFARE DesFire EV1".
and i can get the uid.
but i can't authentication.

is the method to authentication the same?
or do I have to change my work flow?

another question:
is the new card with 128 sectors, and each with 4 blocks?
and the usable capacity 127x3x16=6096 Bytes?

thanks in advance

---

+ 0  |  - 0

[Adnan]

Hi,
MIFARE Classic and DESFire EV1 are two different sort of cards. Classic is sectors-blocks oriented where as DESFire Ev1 is applications-files oriented.
Authentication in EV1 is based on challenge - Response. Please refer to datasheet.
There are also DESFire Application note describing the authentication procedure.
The datasheet and Application notes are available at our docstore(http://docstore.nxp.com/).
Br
Adnan

---

+ 0  |  - 0

[hdou]

Thanks Adnan!

I use the Desfire Card, because of the 8k capacity.
I want to store only (one Application and only one) File for previously encrypted Data. plain text.
Is it possible to do it without authentication process?

H Dou

---

+ 0  |  - 0

[Adnan]

Possible. Please refer to datasheet.

---

+ 0  |  - 0

[Author]

Posts