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This is a nice overview of the various dimensions of security that you need to consider when making research data available on the Internet.
Tanvi Desai, Felix Ritchie, Richard Welpton. The Five Safes: Designing Data Access for Research. Economic Working Paper Series 1601, University of the West of England. Available at http://www2.uwe.ac.uk/faculties/BBS/Documents/1601.pdf.