Designing Confidentiality on the Fly Methodology – Three Aspects
In the development of so called “Confidentiality on the fly” methodology building on random noise implemented with a cell key method, a number of issues have to be addressed. First, there is the choice of the probability distributions for the noise. Of course parameter sets yielding a low loss of information are desirable, but the disclosure risk avoidance potential of a parametrization should also be taken into account. This requires benchmarking of the risk avoidance potential of candidate settings.
Another issue is the communication of the potential effects of the noise on published results. The paper looks at the effect noise may have on estimates resulting from a division of two noisy counts.
Thirdly, a cell key method produces in the first place consistent, but non-additive results which might be difficult to communicate. One is tempted to restore additivity which – amongst other challenges – raises the issue of a technical solution.
The research leading to these results has partially received funding from the EU project “Open Source tools for perturbative confidentiality methods” (Specific grant agreement N° 2018.0108) under the Framework partnership agreement n° 11112.2014.005-2014.533
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