A system of privacy patterns for user control.

Privacy by Design is prescribed by the new European General Data Protection Regulation. Getting this privacy preserving design philosophy appropriately adopted is a challenge, however. One natural approach to this challenge would be to leverage design patterns in the privacy domain. However, privacy patterns are scattered, unrelated, inconsistent, and immature. This paper presents a pattern system for user control, which is built upon an existing privacy pattern catalog. By ensuring implementability and uniformity within descriptions, and establishing relationships using consistent terminology, we alleviate some of the aforementioned issues.