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http://hdl.handle.net/10609/93054
Title: Toward sensitive document release with privacy guarantees
Author: Sánchez Ruenes, David
Batet Sanromà, Montserrat  
Others: Universitat Rovira i Virgili
Universitat Oberta de Catalunya. Internet Interdisciplinary Institute (IN3)
Keywords: document redaction
sanitization
semantics
ontologies
privacy
Issue Date: Nov-2016
Publisher: Engineering Applications of Artificial Intelligence
Citation: Sánchez, D. & Batet, M. (2017). Toward sensitive document release with privacy guarantees. Engineering Applications of Artificial Intelligence, 59(), 23-34. doi: 10.1016/j.engappai.2016.12.013
Also see: https://doi.org/10.1016/j.engappai.2016.12.013
Abstract: Privacy has become a serious concern for modern Information Societies. The sensitive nature of much of the data that are daily exchanged or released to untrusted parties requires that responsible organizations undertake appropriate privacy protection measures. Nowadays, much of these data are texts (e.g., emails, messages posted in social media, healthcare outcomes, etc.) that, because of their unstructured and semantic nature, constitute a challenge for automatic data protection methods. In fact, textual documents are usually protected manually, in a process known as document redaction or sanitization. To do so, human experts identify sensitive terms (i.e., terms that may reveal identities and/or confidential information) and protect them accordingly (e.g., via removal or, preferably, generalization). To relieve experts from this burdensome task, in a previous work we introduced the theoretical basis of C-sanitization, an inherently semantic privacy model that provides the basis to the development of automatic document redaction/sanitization algorithms and offers clear and a priori privacy guarantees on data protection; even though its potential benefits C-sanitization still presents some limitations when applied to practice (mainly regarding flexibility, efficiency and accuracy). In this paper, we propose a new more flexible model, named (C, g(C))-sanitization, which enables an intuitive configuration of the trade-off between the desired level of protection (i.e., controlled information disclosure) and the preservation of the utility of the protected data (i.e., amount of semantics to be preserved). Moreover, we also present a set of technical solutions and algorithms that provide an efficient and scalable implementation of the model and improve its practical accuracy, as we also illustrate through empirical experiments.
Language: English
URI: http://hdl.handle.net/10609/93054
ISSN: 0952-1976MIAR
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