Stefan Berger works at IBM Research. His focus is on cloud security, virtualization security, trusted computing and more recently on security for containers. He is actively involved in several open source projects related to Linux virtualization, Linux containers, as well as the Linux Kernel. He is also the maintainer of several open source projects related to trusted computing and container image security and is the main author of the virtualized Trusted Platform Module (TPM) used in the QEMU ecosystem. He has been a speaker at various conferences related to open source.