MIFARE DESFire EV2 and general NFC question

[wat]

I'm wondering if anyone has experience with MIFARE DESFire NFC devices or similar ones and can provide input on whether our goal and strategy are possible:

Our goal is to have the MIFARE DESFire EV2 device, when scanned by a user's mobile phone, enable the user to claim a one-time prize via their phone's browser from our website. The prize should only be claimed if the user actually scanned the NFC, and should only be claimed once.

Our thinking is to have the EV2 uses its private key to sign a message that consists of a unique identifier (to prevent replay), such as the time, and send it to our backend server for verification (which holds the private keys). After verification, a unique url will open on the phone's browser, allowing the user to log in/sign up to claim the prize once.

We'd appreciate any input. Our company is also interested in hiring/contracting an engineer to achieve this.

[fangfang]

Hello @wat .

Thank you for contacting NXP technical support.

MIFARE DESFire EV2 can work for your application. But  EV2 is not recommended for new designs. For new designs please use replacement product MIFARE DESFire EV3.

For the more information please kindly refer to the information as the link.

URL:https://www.nxp.com/products/rfid-nfc/mifare-hf/mifare-desfire/mifare-desfire-ev3-high-security-ic-f....

Have a nice day.

[wat]

Thanks for the response.

We're using the EV2 because there is a shortage on EV3s according to our supplier.

Regarding programming them, how would you recommend doing this for our application?

[fangfang]

Hello @wat .

Thanks for your update information.

We will have to recommend you to please use our PEGODA Reader along with RFIDDiscover Software. With the use of these tools, you will be able to create MIFARE applications that will fill your needs with the required encryption to suit your needs.
Unfortunately, almost all of this support material is in Docstore and is under NDA. Please kindly refer to the Docstore information as the attachment..

Have a nice day.

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