ONS approaches to Statistical
Targeted Record Swapping is our main source of protection against unique records. We identify the records most at risk by targeting a wide range of variables and protect these households by greece rcs data matching them to another household with similar characteristics in a nearby geographic area.
In the case of the elephant, this could be a household of the same size with a pet hippopotamus in the next town, and the two households will swap between the two areas. The aggregated characteristics of both areas will remain broadly unchanged, with the same number of people and the same number of large mammals, however where the neighbours expect to see an elephant in the outputs, they will find a hippopotamus.
Cell Key Perturbation
The next layer of protection is the Cell Key Perturbation method that protects against disclosure by differencing similar tables. The FTB will allow users to choose the geography, population, variables and level of detail in their tables.