  The roles of trust, security and privacy are somewhat interconnected, but
different facets of next generation networks. The challenges in creating a
trustworthy 6G are multidisciplinary spanning technology, regulation,
techno-economics, politics and ethics. This white paper addresses their
fundamental research challenges in three key areas. Trust: Under the current
"open internet" regulation, the telco cloud can be used for trust services only
equally for all users. 6G network must support embedded trust for increased
level of information security in 6G. Trust modeling, trust policies and trust
mechanisms need to be defined. 6G interlinks physical and digital worlds making
safety dependent on information security. Therefore, we need trustworthy 6G.
Security: In 6G era, the dependence of the economy and societies on IT and the
networks will deepen. The role of IT and the networks in national security
keeps rising - a continuation of what we see in 5G. The development towards
cloud and edge native infrastructures is expected to continue in 6G networks,
and we need holistic 6G network security architecture planning. Security
automation opens new questions: machine learning can be used to make safer
systems, but also more dangerous attacks. Physical layer security techniques
can also represent efficient solutions for securing less investigated network
segments as first line of defense. Privacy: There is currently no way to
unambiguously determine when linked, deidentified datasets cross the threshold
to become personally identifiable. Courts in different parts of the world are
making decisions about whether privacy is being infringed, while companies are
seeking new ways to exploit private data to create new business revenues. As
solution alternatives, we may consider blockchain, distributed ledger
technologies and differential privacy approaches.
