topic Access cards in Other NXP Products

Access cards

Serhii91 — Fri, 07 Nov 2025 16:49:01 GMT

Good evening. I purchased Mifare Plus X (2K/4K) cards. When I try to upgrade them to security level SL3, I get an error message saying that the card has security level SL1. To upgrade to SL3, I need the AES keys that were set when the cards were initialized at SL1. Is it possible to obtain them?

Re: Access cards

EduardoZamora — Fri, 07 Nov 2025 20:18:02 GMT

Hello @Serhii91

Hope you are doing well.

Could you please confirm if you are using already personalized Cards? If so, please contact the Card manufacturer/issuer to try to get more information on the Keys used during personalization.

Regards,
Eduardo.

Re: Access cards

Serhii91 — Mon, 10 Nov 2025 08:01:53 GMT

Good afternoon, yes, the cards are personalized. The manufacturer only produces cards with chips manufactured by NXP. The manufacturer does not have information about the codes used for card personalization.

Re: Access cards

Serhii91 — Mon, 10 Nov 2025 08:45:40 GMT

Re: Access cards

EduardoZamora — Mon, 10 Nov 2025 18:11:26 GMT

Hi,

Could you please kindly clarify the reason you are using MIFARE Plus X in your project? What is the purpose of your application?

Resources supporting MIFARE Plus X are restricted and they are secured under NDA (Non-Disclosure Agreement). For more information on this part, please contact your local distributor from the Distributor Network | NXP Semiconductors.

Regards,
Eduardo.

Re: Access cards

Serhii91 — Tue, 11 Nov 2025 07:26:39 GMT

Good afternoon. Protect cards from hacking and counterfeiting. They will be used in the personnel access control system. I tried using MIFARE Plus S та MIFARE Plus X. I couldn't bring them up to SL3 security level.

Re: Access cards

EduardoZamora — Tue, 11 Nov 2025 17:51:57 GMT

Hi,

MIFARE Plus S status is set as No Longer Manufactured. Focus product from the MIFARE Plus portfolio is MIFARE Plus EV2.

For further support on MIFARE Plus S and X, please contact your local Distributor from the Distributor Network | NXP Semiconductors.

I apologize for the inconvenience.

Regards,
Eduardo.