Reputation: 67
I received the the following IAD
after processing the GPO command
, my question then, how is the 9F10 EMV token
constructed? Here is the token.
06010A03A020000F04000000000000000000006232E4F9
I am required to send only the CVR
portion to the acquiring switch.
Upvotes: 5
Views: 15924
Reputation: 12243
From EMV 4.3 Book 3 Common Core Definitions, Application Specification, November 2011, Page 206, C7.2 The CVR has a fixed length of 5 bytes (10 hexadecimals characters) that are the bytes 4-8 included of Issuer Application Data, EMV tag 9F10. The 3 first bytes of 9F10 being the following.
b1 the length
b2 derivation key index
b3 the cryptogram version
It seems however that the format of this field might vary between schemes.
Upvotes: 6
Reputation: 2211
Looking at the cryptogram version I assume this is from a Visa card. The TLV is 9F10 17 06010A03A020000F04000000000000000000006232E4F9 ?
17 is the total length of the data 06 is the length of issuer descretionary data 01 is derivation key index 0A is the cryptogram version (10 in this case ). 03 Length of CVR A02000 is the CVR here
Upvotes: 5