Hi Phil, thank you for your help. Now it works! But I don’t know why. Maybe I made a fault during the installation several times? I’ve performed the getting started guide again and after bindig the key to the pi I made a backup image. Then I encrypted the PIs root partition and it works as expected. The system booted with the encrypted root partition.
Is it possible that the installation skript has made only a partial installation and zymkey is nevertheless bound to the pi? Or maybe the encrytion process run only partly? I’ve made the first installations with a gsm modem and the last one via lan.