By now the TVR records everything that went wrong. Terminal action analysis (EMV Book 3 §10.7) turns it into a request to the card; card action analysis (§10.8) is the card's answer.
Action analysis and cryptograms
Needs: Supporter
TAC and IAC with worked examples, the cryptogram types, CDA requests and what the card may answer.
This is a supporter feature. Create a free account, then try every supporter feature free for 7 days.
The opening of the article
In the full article
- The action codes
- The decision
- The GENERATE AC request
- Card action analysis
- The cryptogram
- Worked example
The rest of the article opens with a supporter pass, which you can try free for 7 days.