Mastercard · NFC

Mastercard contactless, full session

Step through a transaction one command at a time. Every field named, every status word explained.

Response

6A 82

Status word

6A82File or application not found.

Decoded objects

No TLV objects in this response.

Exercises

Answer from the capture above. The explanation is worth reading either way.

Level 1
The terminal first selects 1PAY.SYS.DDF01. What status word does the card answer with?
Level 2
Tag 5F28 carries the issuer country code. What is its value, and which country is it?
Level 3
In the CVM list (tag 8E), what is the very first cardholder verification method the card proposes?
Level 2
The Cryptogram Information Data (tag 9F27) is 80. Which of the three cryptogram types did the card return: TC, ARQC or AAC?
Level 1
How many transactions has this card performed, according to its Application Transaction Counter (tag 9F36)? Answer in decimal.