The Effectiveness Of Output Modification By Rounding For Protection Of Statistical Data Bases

AbstractThis paper discusses the security problem for statistical data bases and examines in some detail a couple of techniques, namely rounding and random rounding, which have been proposed to solve the statistical data base security problem. These techniques are studied in connection with a simple model of a statistical data base which produces crosstabulations. Analysis of the effects of both techniques on data base output indicates that, with suitable choice of base, rounding may be a more secure technique than random rounding.