\chapter{Preliminaries}
\label{ch:prel}

In this chapter, we introduce some relevant terminology and background knowledge around the problem of continuous publishing of sensitive data sets.
First, in Section~\ref{sec:data}, we categorize data and the process of their publishing in the context of continuous data publishing.
Second, in Section~\ref{sec:privacy}, we define information disclosure in data privacy, we list the kinds of attacks identified in the literature, the desired privacy levels that can be achieved, the fundamental privacy operations that are applied to achieve data privacy, and finally we provide a brief overview of the seminal works on privacy-preserving data publishing.
Third, in Section~\ref{sec:correlation}, we list the different types of correlation, we document ways to extract data dependence from continuous data, and we investigate the privacy risks that data correlation entails with special focus on the privacy loss under temporal correlation.

\input{preliminaries/data}
\input{preliminaries/privacy}
\input{preliminaries/correlation}
\input{preliminaries/summary}
