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A graphical framework to evaluate risk assessment and information loss at individual level

When dealing with statistical disclosure control (SDC) problems two aspects have to be considered. Firstly, a rule based on a measure of the risk of disclosure has to be adopted in order to decide if a certain release of data is safe or unsafe. Secondly, protection methods have to be applied to reduce the risk of identification when the release of data is classified as unsafe. The performance of a protection method is usually measured in terms of ‘risk of disclosure’ and ‘information loss’. In this work we present a graphical framework named ‘confidentiality plot’ for the evaluation of risk of disclosure at individual level. For some extent the tool can be jointly used to evaluate risk of disclosure and information loss.