Transponder VW up 2013

[M0rtuuS]

Hello,

I have an VW up! MY 2013 and want to learn an extra remote key to the car. The remote part was no problem with my original VCDS cable. But for the transponder I need the SKC to login.
Where can I extract the SKC from this car? OBD maybe or ECU/dash eeprom? And on what kind of chip would the eeprom then be? 24cxx?
Is there a tool to find the SKC in the dump?
I think I will need an ID48 chip, but does it need to be preprogrammed to for example an T23?

Thanks!