A:
Tag 57 is the the Track 2 Equivalent Data in the EMV transaction payload. You can refer Refer to the format definition of tag Tag 57 from the Visa CTLS spec. specification to make out the rest of the values in the Tag 57 tag.
Below is the breakdown of the sample tag 57 value: 12 34 56 78 90 00 98 76 d2 D2 41 02 01 00 00 03 20 00 00 1f1F.
- 12 34 56 78 90 00 98
...
- 76 is the PAN
...
- D is the field separator
...
- 24 10 is the expiration date (YYMM)
- 201 is the service code
- 00 00 03 20 00 00 1 is the PIN verification data (if present) and the discretionary data
...
- F is the padding to ensure the whole bytes
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Different card brands have their own tags for the same data. |
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