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|Título: ||Building anonymised database samples|
|Autor: ||Areal, Bruno Miguel de Melo Gonçalves|
|Orientador: ||Alferes, José Júlio|
|Palavras-chave: ||Anonymous sampling|
|Issue Date: ||2011|
|Editora: ||Faculdade de Ciências e Tecnologia|
|Resumo: ||In this work we propose Anonym Database Sampler (ADS), a flexible and modular
system capable of extracting an anonymised, consistent and representative sample from
a relational database. ADS was envisioned for use in testing and development environments.
To this end, a sample specification input is requested from the user, that is used by
ADS’s sampling engine to perform a stratified random sample. Afterwards a First-choice hill climbing algorithm is applied to the sample, optimising the selected data towards the specified requisites.
Finally, if some restrictions are still to be met, tuples and/or keys modifications are
performed, ensuring that the final sample fully complies with the initial sample specification.
While having a representative and sound database that developers can use in these
environments can be a great advantage, we assume that this representativeness does not
need to comply with a truly statistical representativity, which would be much harder to obtain. Thereby, ADS samples are not appropriate for any kind of statistical data analysis.
After the sample being successfully extracted, due to the sensitivity of the data contained in most organisation databases, a data anonymisation step is performed. The sampled data is consistently enciphered and masked, preventing data privacy breaches that could occur by delivering to developers a database containing some real operational data.|
|Descrição: ||Dissertação para obtenção do Grau de Mestre em
|Appears in Collections:||FCT: DI - Dissertações de Mestrado|
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