TapLinx Package Key & DESFire EV3 Default PICC Key Clarification

[Kimanikihiu]

I recently procured MIFARE DESFire EV3 cards and would like to confirm whether they use a known factory-default PICC master key (e.g. all-zero AES/2K3DES/DES), or if the key is card-vendor dependent.

My intention is to verify this via the TapLinx Android sample application by authenticating to the PICC (KeyNo 0). However, to build the sample APK, a valid TapLinx packageKey must be defined in the code:

static final String packageKey = "";

Before proceeding with building the test app, could you please confirm:

1. Whether there is a documented default PICC master key for DESFire EV3 cards, and

2. How to generate or obtain the appropriate TapLinx packageKey for my application.

Thank you for your guidance.

[Fabian_R]

Hello,

Thank you for your interest in our products. As you may already know, MIFARE DESFire is a restricted product and requires to have an NDA in order to get further information. My recommendation is to please contact any of our Distributors.

Answering your second question, please take a look at the TapLinx site: TapLinx SDK for MIFARE, NTAG, ICODE and UCODE | NXP Semiconductors In the Documentation section, you will find the relevant User Guide for your development platform. Each document explains how to create your own user and register your application.