This session discusses how trust is established within and around communities, and the very particular characteristics of trust and open source. Trust is often ill-defined, and understanding what it means allows us to model our interactions - and plan how we build, deploy and operate open source (and even proprietary) software. Mike is the author of "Trust in Computer Systems and the Cloud" (Wiley, 2021), and has been involved with open source for over 20 years. Join him to uncover what we can do to explain trust around open source, how we can model what we do and how we can improve trust towards, within and between our communities.