In this recipe, we applied three different mechanisms for noise-based location obfuscation: Rand, N-Rand, and Pinwheel, defining PostgreSQL functions in PLPGSQL for each method. We used one of the functions in a trigger in order to automatically alter the incoming data, so that no changes would need to be made on the application on the user's side. In addition, we showed the impact of noise comparing two versions of the altered data, so we can better appreciate the impact of the configuration noise settings
In the following recipes, we will look at an implementation of a private information retrieval-based LPPM.
