Title page for ETD etd-07292011-094636

Document Type Doctoral Thesis
Author Van Staden, Wynand Johannes Christiaan
Email wvs@wvs.za.net
URN etd-07292011-094636
Document Title A model for compound purposes and reasons as a privacy enhancing technology in a relational database
Degree PhD
Department Computer Science
Advisor Name Title
Prof M S Olivier Committee Chair
  • purposes
  • privacy enhancing technologies
  • privacy
  • compound purposes
  • verification
  • privacy agreements
Date 2011-09-07
Availability unrestricted
The protection of privacy related information of the individual is receiving increasing attention. Particular focus is on the protection of user interaction with other users or service providers. Protection of this interaction centres on anonymising the user’s actions, or protecting “what we do”. An equally important aspect is protecting the information related to a user that is stored in some electronic way (or protecting “who we are”). This may be profile information on a social networking site, or personal information in a bank’s database.

A typical approach to protecting the user (data owner) in this case is to tag their data with the “purpose” the collecting entity (data controller) has for the data. These purposes are in most cases singular in nature (there is “one” purpose – no combinations of purposes – of the data), and provide little in the way of flexibility when specifying a privacy policy. Moreover, in all cases the user accessing the data (data user) does little to state their intent with the data.

New types of purposes called compound purposes, which are combinations of singular or other compound purposes, are proposed and examined in this text. In addition to presenting the notion of compound purposes, compound reasons are also presented. Compound reasons represent the intent of the entity using the data (the data user) with the data.

Also considered are the benefits of having the data user specifying their intent with data explicitly, the verification of compound reasons (the data user’s statement of intent) against compound purposes, the integration of compound statements in existing technologies such as SQL by providing a model for using compound purposes and reasons in a relational database management system for protecting privacy, and the use of compounds (purposes and reasons) as a method for managing privacy agreements.

© 2011 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

Please cite as follows:

Van Staden, WJC 2011, A model for compound purposes and reasons as a privacy enhancing technology in a relational database, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-07292011-094636/ >


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