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Thanks for the answer.
No, I didn't forget the second part, but if I feed in the auth second part the same 32 bytes that I compute for first authentication it's not ok, the card returns authentication error, that's why I think I must return something else and also not derive kenc/kmac again as this would go against the idea of a lighter form of authentication. However, I'm not sure what the second part looks like for following authentication.
Unfortunately, all the datasheets that I can find with the name you mentioned have about 20 pages, they seem to be vastly shortened.
No, I didn't forget the second part, but if I feed in the auth second part the same 32 bytes that I compute for first authentication it's not ok, the card returns authentication error, that's why I think I must return something else and also not derive kenc/kmac again as this would go against the idea of a lighter form of authentication. However, I'm not sure what the second part looks like for following authentication.
Unfortunately, all the datasheets that I can find with the name you mentioned have about 20 pages, they seem to be vastly shortened.
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