Data swapping for protecting census tables
Data swapping for protecting census tables
The pre-tabular statistical disclosure control (SDC) method of data swapping is the preferred method for protecting Census tabular data in some National Statistical Institutes, including the United States and Great Britain. A pre-tabular SDC method has the advantage that it only needs to be carried out once on the microdata and all tables released (under the conditions of the output strategies, eg. fixed categories of variables, minimum cell size and population thresholds) are considered protected. In this paper, we propose a method for targeted data swapping. The method involves a probability proportional to size selection strategy of high risk households for data swapping. The selected households are then paired with other households having the same control variables. In addition, the distance between paired households is determined by the level of risk with respect to the geographical hierarchies. The strategy is compared to a random data swapping strategy in terms of the disclosure risk and data utility.
targeted data swap, random data swap, disclosure risk, data utility, r-u confidentiality map
1-13
Southampton Statistical Sciences Research Institute, University of Southampton
Shlomo, Natalie
e749febc-b7b9-4017-be48-96d59dd03215
Tudor, Caroline
66a5c1bb-60b0-478c-a4ea-e6b3228bd0e3
Groom, Paul
3340d624-3ff0-4fd6-b81f-36ca326751f6
16 July 2010
Shlomo, Natalie
e749febc-b7b9-4017-be48-96d59dd03215
Tudor, Caroline
66a5c1bb-60b0-478c-a4ea-e6b3228bd0e3
Groom, Paul
3340d624-3ff0-4fd6-b81f-36ca326751f6
Shlomo, Natalie, Tudor, Caroline and Groom, Paul
(2010)
Data swapping for protecting census tables
(S3RI Methodology Working Papers, M10/06)
Southampton, GB.
Southampton Statistical Sciences Research Institute, University of Southampton
Record type:
Monograph
(Working Paper)
Abstract
The pre-tabular statistical disclosure control (SDC) method of data swapping is the preferred method for protecting Census tabular data in some National Statistical Institutes, including the United States and Great Britain. A pre-tabular SDC method has the advantage that it only needs to be carried out once on the microdata and all tables released (under the conditions of the output strategies, eg. fixed categories of variables, minimum cell size and population thresholds) are considered protected. In this paper, we propose a method for targeted data swapping. The method involves a probability proportional to size selection strategy of high risk households for data swapping. The selected households are then paired with other households having the same control variables. In addition, the distance between paired households is determined by the level of risk with respect to the geographical hierarchies. The strategy is compared to a random data swapping strategy in terms of the disclosure risk and data utility.
Text
s3ri-workingpaper-M10-06.pdf
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More information
Published date: 16 July 2010
Keywords:
targeted data swap, random data swap, disclosure risk, data utility, r-u confidentiality map
Identifiers
Local EPrints ID: 160661
URI: http://eprints.soton.ac.uk/id/eprint/160661
PURE UUID: 038f4f9c-3da3-428f-a030-77e31f7b74eb
Catalogue record
Date deposited: 16 Jul 2010 10:23
Last modified: 06 Oct 2020 23:13
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Contributors
Author:
Natalie Shlomo
Author:
Caroline Tudor
Author:
Paul Groom
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