Need help understanding SAM AV2 ChangeKeyEntry APDU / key personalization flow

kupn — Fri, 29 May 2026 15:43:41 GMT

Hello everyone,

I am currently working with a MIFARE SAM AV2 and I have managed to complete host authentication successfully. However, I am currently blocked because I do not fully understand how to build the APDU frame for key personalization commands, especially `ChangeKeyEntry`.

I understand that some information related to SAM AV2 personalization may be covered by NDA or restricted documentation.

In my case, I already have an active NDA in place, so I would greatly appreciate guidance on how I can officially request access to the application note:

"MIFARE SAM AV2 – Key Management and Personalization"
Document number: 1823xx

Could someone please advise:

* whether this document is still available,
* through which channel it can be requested,
* and who I should contact at NXP to obtain access under the existing NDA?

Thanks in advance.

Re: Need help understanding SAM AV2 ChangeKeyEntry APDU / key personalization flow

EduardoZamora — Fri, 29 May 2026 21:42:57 GMT

Hello @kupn

Hope you are doing well.

Please consider that we recommend using MIFARE SAM AV3.

As you mentioned, resources supporting SAM AVx are secured under NDA and must be requested through the Secure Resources. If you already have a valid NDA with NXP, you would need to request access to the required items through Secure Access Rights by following the instructions from this page: Secure Access Rights | NXP Semiconductors. Also, I would recommend checking the Secure Access Rights FAQs | NXP Semiconductors.

Regards,
Eduardo.

topic Re: Need help understanding SAM AV2 ChangeKeyEntry APDU / key personalization flow in NFC

Need help understanding SAM AV2 ChangeKeyEntry APDU / key personalization flow

Re: Need help understanding SAM AV2 ChangeKeyEntry APDU / key personalization flow