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What is its data field in EXTERNAL AUTHENTICATE command?

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mikegigom
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What is its data field in EXTERNAL AUTHENTICATE command?

Post by mikegigom » Thu Dec 10, 2015 5:13 am

If I want to send EXTERNAL AUTHENTICATE command to the card, what is its data field? I have read GP2.1.1, it's hard for me to understand.
I would be greatly thankful if anybody can explain this authentication process simply with details.

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mabel
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Re: What is its data field in EXTERNAL AUTHENTICATE command?

Post by mabel » Thu Dec 31, 2015 2:42 am

The EXTERNAL AUTHENTICATE command is used by the card to authenticate the host and to determine the
level of security required for all subsequent commands.



From the table, you can see the data field sent in the command.
The data field of the command message contains the host cryptogram and the APDU command MAC.
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