3Tem
CVV2 calculation with TR-31 Key
I need to use the CVK Key (in key block format) to calculate the CVV2.
In the past, I have always used single keys in variant format for this purpose (CVKa + CVKb), and the calculation procedure is standard (there are also many online calculators that use it).
Now, with the introduction of key block, how has the CVV2 calculation changed?
