Privacy Principles: Towards a Common Privacy Audit Methodology

A lot of privacy principles have been proposed in the literature with the aim to preserve users' privacy through the protection of the personal data collected by service providers. Despite the fact that there were remarkable efforts to gather all privacy principles and use them on a common privacy-by-design system, to the best of our knowledge, there is no published methodology that combines in a clear and structured way the existing privacy principles for supporting the design of a Privacy Preserving System. The absence of a widely accepted structured representation of the privacy principles makes their adoption or/and satisfaction difficult and in some cases inconsistent. Considering that privacy protection on its own is not an easy task for an organisation, the scattered privacy principles impose significant additional complexity. Consequently, very frequently organizations fail to effectively protect the privacy of their users. In this paper a structured privacy audit methodology that consists of discrete steps that organizations can follow for deciding or/and auditing the privacy protection measures is proposed. Every step is based on the significance of a privacy principle and on the sequence of the audit procedure.