Situational Awareness based Risk-Adapatable Access Control in Enterprise Networks

TL;DR

This paper discusses applying risk-adaptable access control (RAdAC) within zero trust networking (ZTN) for enterprise security, emphasizing dynamic context evaluation and situational awareness integration.

Contribution

It introduces the FURZE framework for fuzzy risk evaluation and explores incorporating enterprise security situational awareness into RAdAC models.

Findings

Development of the FURZE policy management framework

Conceptual integration of SSA into RAdAC for improved security decisions

Application of RAdAC principles to ZTN environments

Abstract

As the computing landscape evolves towards distributed architectures such as Internet of Things (IoT),enterprises are moving away from traditional perimeter based security models toward so called zero trust networking (ZTN) models that treat both the intranet and Internet as equally untrustworthy. Such security models incorporate risk arising from dynamic and situational factors, such as device location and security risk level risk, into the access control decision. Researchers have developed a number of risk models such as RAdAC (Risk Adaptable Access Control) to handle dynamic contexts and these have been applied to medical and other scenarios. In this position paper we describe our ongoing work to apply RAdAC to ZTN. We develop a policy management framework, FURZE, to facilitate fuzzy risk evaluation that also defines how to adapt to dynamically changing contexts. We also consider how enterprise security situational awareness (SSA) - which describes the potential impact to an organisations mission based on the current threats and the relative importance of the information asset under threat - can be incorporated into a RAdAC scheme