S. Paulus/N. Pohlmann/H. Reimer, ISSE 2006 - Securing Electronic Business Processes, 2006-10, p. 81
Data avoidance is an overarching principle in data protection. It imposes the obligation to keep data in a form which permits identification of data subjects for no longer than it is necessary for the purposes for which the data were collected or for which they are further processed. The amount and quality of data must not be excessive, i.e.: they must be limited to the absolute minimum necessary for the purpose pursued.