SCP03 key version

[deang]

Is there any information on how to set/use the key version when rotating SCP03 keys and using them?  In nxScp03_CP_InitializedUpdate() (in se05x_APDU_impl.c) the key version is set here:

     tlvHeader_t hdr = {{CLA_GP_7816, INS_GP_INITIALIZE_UPDATE, keyVersion, 0x00}};

For SCP03 the version is 0xB.  If I rotate the SCP03 keys should this number change?

I'm using the NXP Nano package.

Dean

[Kan_Li · Accepted solution]

Hi @deang ,

The key version number (KVN) is the identifier of the slot where the key is stored. It shall stay the same, the existing key should get exchanged on the key rotation to overwrite the previously stored default key. 

Have a great day,
Kan

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[deang]

Thanks @Kan_Li 

Dean