Digital communities are collections of individual entities that are connected together. They can be modeled as graphs, with the individuals being nodes and their relationships being edges. Traditionally, identity models have focused on the nodes, but in Musings of a Trust Architect: Edge Identifiers & Cliques, I suggested that both private keys and public-key identifiers could be based on the relational edges, and that when you combined a complete set of edges you could create a cryptographic...