Hi Ilias, I finally picked up the TPM you recommended (LetsTrust [1]) and attached it to a rpi4 and used the instructions at [2]. It seems to work fine in my CI - see [3]. Regards, Simon [1] https://buyzero.de/products/letstrust-hardware-tpm-trusted-platform-module [2] https://github.com/joholl/rpi4-uboot-tpm [3] https://sjg.u-boot.org/u-boot/u-boot/-/jobs/69998