  Configuration management in networks with highest security demands must not
depend on just one administrator and her device. Otherwise, problems can be
caused by mistakes or malicious behavior of this admin, or when her computer
got compromised, which allows an attacker to abuse the administrator's
far-reaching permissions.
  Instead, we propose to use a reliable and resilient configuration management
process orchestrated by a configuration management system (CMS). This can be
achieved by separation of concerns (proposing a configuration vs. authorizing
it), employing multi-party authorization (MPA), and enforcing that only
authorized configurations can be deployed. This results in a configuration
management process that is decentralized on a human, decision-making level, and
a technical, device level.
  However, due to different opinions or adversarial interference, the result of
an MPA process can end in a conflict. This raises the question how such
conflicts can be mediated in a better way than just employing majority voting,
which is insufficient in certain situations. As an alternative, this paper
introduces building blocks of customizable conflict mediation strategies which
we integrated into our CMS TANCS . The conflict mediation functionality as well
as the initial TANCS implementation run on top of the distributed ledger and
smart contract framework Hyperledger Fabric which makes all processes resilient
and tamper-resistant.
