  The stringent low-latency, high reliability, availability and resilience
requirements of 6G use cases will present challenges to cloud providers.
Currently, cloud providers lack simple, efficient, and secure implementation of
provisioning solutions that meet these challenges. Multi-cloud federation is a
promising approach. In this paper, we evaluate the application of private and
public blockchain networks for multi-cloud federation. We compare the
performance of blockchain-based federation in private and public blockchain
networks and their integration with a production-ready orchestration solution.
Our results show that the public blockchain needs approximately 91 seconds to
complete the federation procedure compared to the 48 seconds in the private
blockchain scenario.
