ext-auth plain and ext-auth mac difference?

Hello~

I'm using JCOP Toolkit to send APDU.

I authenticated with JCOP Card and put 3 keys and changed card status from INITIALIZED to SECURED.

Since I change card status , I'm not able to authenticate with 'ext-auth plain'.

Instead of using plain , I should use 'ext-auth mac'.

Since I authenticated with 'ext-auth mac' , some additional data are added in APDU. What is this?

Any help will be greatly appreciated

[463 byte] By [jgyoo74a] at [2007-10-2 5:12:36]

# 1

I guess MAC value is added at the end of every APDU.I wonder how MAC values is calculated?Please help~

jgyoo74a at 2007-7-16 1:15:15 >

# 2

Please read the Global Platform specifications -- look for Secure Messaging Protocols.

mkdataa at 2007-7-16 1:15:15 >

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