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Two software packages for Statistical Disclosure Control are called Argus.

µ-Argus is a specialized software tool for the protection of microdata.

The two main techniques used for this are global recoding and local suppression. In the case of global recoding several categories of a variable are collapsed into a single one. The effect of local suppression is that one or more values in an unsafe combination are suppressed, i.e. replaced by a missing value.

Both global recoding and local suppression lead to a loss of information, because either less detailed information is provided or some information is not given at all. t-Argus is a specialized software tool for the protection of tabular data. t-Argus is used to produce safe tables. t-Argus uses the same two main techniques as µ-Argus: global recoding and local suppression. For t-Argus the latter consists of suppression of cells in a table (whose data will be averaged) may be fixed or random. The average associated with a particular group may be assigned to all members of a group, or to the "middle" member (as in a moving average). It may be performed on more than one variable with different groupings for each variable.

Source Publication:
Statistics Netherlands, Statistics Canada, Germany FSO, University of Manchester, 2005, Glossary of Statistical Disclosure Control, incorporated in paper presented at Joint UNECE/Eurostat work session on statistical data confidentiality, Geneva, 9-11 October 2005.

Statistical Theme: Methodological information (metadata)

Created on Wednesday, November 9, 2005