thats why i say to first read data during a transaction
so you would start to see what's happened and what data going on
after we can talk
to do this you not need to program nothing
is all about config already existing tools open source, nothing else
just reading the pdf = just reading it give you answer of it
https://courses.cs.ut.ee/MTAT.07.022...report-f14.pdf
"To achieve this a standard ID
card reader was modified by adding a smart card
contact interface which could be connected to the
wires included in the Simtrace package (Figure 2).
After Simtrace was customized and the software
which sends captured data to the computer was
installed and configured, the sniffing of real world
transaction could begin."
"he transaction analyzed in this report was captured
using a terminal from a friendly merchant in Tartu
and using a Visa Electron debit card issued by SEB
Estonia. The amount of transaction was 0.99 EUR.
The transaction was performed in September, 2014.
The full output (all requests and responses) with
annotation can be found from the appendix.
The final setup for the capture can be seen in
Figure 3.
During the transaction, the computer
connected to the Simtrace board produced a stream
of APDU requests and responses"
