I am reading the specifications for ISO-7816 and ISO-14443 standards for contact payment and contactless payment. I found they were heard to read and understand, sometimes I was confused by the wordings. Anybody could please recommend an easier-to-understand document? It is better to have some simple samples for the APDUs. Thank you!
In my experience, I read first part of ISO-7816-4.
APDU(CLA, INS, P1P2 and so on), logical channel and secure message.
And I read GP Card Spec v2.1.1.
It include some examples and basic commands.
Don't peruse ISO spec first. That is difficult and abstract for beginner I think.