Ja. George et al., CONFIDENTIALITY CONTROL OF TABULATED DATA - SOME PRACTICAL NETWORK MODELS, European journal of operational research, 85(3), 1995, pp. 454-472
Citations number
17
Categorie Soggetti
Management,"Operatione Research & Management Science
The problem of confidentiality control is a significant issue for stat
istics gathering organisations. Most existing methods suffer from a va
riety of difficulties for practical implementation. This paper present
s techniques for confidentiality control of tabulated data using netwo
rk formulations to overcome many of the weaknesses of the current meth
ods. These techniques are based on the established methodology of cont
rolled rounding, which preserves additivity in the resulting solution,
while adding a number of pieces of new material. Firstly, a controlle
d rounding formulation is introduced that is designed to provide an un
biased solution. Then we construct three variations of a controlled pe
rturbation technique using different forms of bounds on the cells. Fin
ally, a methodology is explained for disturbing only the small-valued
cells of the table using each of the four basic methods. A simple exam
ple of the methods and results from experimentation on the use of the
methods show that they satisfy the needs of confidentiality and are co
mputationally viable.