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22
Implementing an
Inference Controller
forSocial Media Data
22.1 INTRODUCTION
Traditionally, we protect data using policies, such as access control policies and sanitization-based
policies. However, current mechanisms for enforcing these policies do not operate over data that
takes the form of a directed graph (Braun et al., 2008). Additionally, users can infer sensitive infor-
mation from the results returned by performing frequent queries over a provenance graph. We are
particularly interested in any conclusion formed from premises where the conclusion is formed
without any expressed or prior approval from anyone or any organization t