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Study on the modeling and analyzing of the role-based threats in the cyberspace

The modeling of the cyberspace and the analyzing of the threats in the cyberspace are both the innovational aspects in the area of defense space. The multi-networks, multi-subsystems, multi-roles and multi-level-threats of the cyberspace cause the nonlinearity and the indefiniteness of it which makes it difficult for us to represent, model and analyze the threat of it. This paper is focused on the study of the building the model of the cyberspace from the view of the roles. Considering the construction of the cyberspace and the actors in the cyberspace being multinetworks and multi-roles, we construct the cyberspace bipartite network to describe the original pattern of connections of it. Then we perform two projections onto the actors and roles separately and construct the actor-network and the role-network based on the cyberspace bipartite network. To analyze the multi-level threats formally, the paper uses the case theory to establish the role-based multi-level threats model called RBT. The article also proposes the methodology using the RBT model to analyze the role-based multi-level threats in the cyberspace formally and effectively.