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NXP_DIE_DICE_UDS_MK_SK in ELS key slots on MCXN947

Hello,

I want to use NXP_DIE_DICE_UDS_MK_SK as input key of HKDF to derive the secret on MCXN947.
But, secure reference manual doesn't describe precise slot number of it.
I found some other keys like NXP_DIE_MK_SK in 9.9 ELS key store state after boot.

YosukeW_2-1777270518788.png

YosukeW_1-1777270461387.png

Could you please tell me it ?

Thank you and Best regards, Yosuke

MCXNSecurity(Edgelock | secure boot | OTP)Re: NXP_DIE_DICE_UDS_MK_SK in ELS key slots on MCXN947

Hello @YosukeW 

Yes, the MCXN947 Security Reference Manual does not cover this topic. I will confirm with our internal team and update you as soon as I have any new information.
Thank you.

BR

Alice

Re: NXP_DIE_DICE_UDS_MK_SK in ELS key slots on MCXN947

Hi @YosukeW 


This key is intended for use by the ROM only during the boot phase.

So customer can use other key, for example CUST_DIE_DICE_CDI_MK_SK.

Thanks for your understanding. 


BR

Alice

Re: NXP_DIE_DICE_UDS_MK_SK in ELS key slots on MCXN947

Hello @Alice_Yang ,

Thank you for clear response.
I got you.

Best regards, Yosuke

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‎05-11-2026 02:31 AM
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