
1
Chapter 1
Introduction
1.1 Overview
Inference is the process of forming conclusions from premises. Inferred knowl-
edge is harmful when a user is not authorized to acquire such information from
legitimate responses that he or she receives. Providing a solution to the inference
problem where users issue multiple requests and consequently infer unauthorized
knowledge is an open problem. An inference controller is a device that is used to
detect or prevent the occurrence of the inference problem. However, an inference
controller will never know in full the inferences possible from the answers to a
query request since there is always some prior k ...