André N. Klingsheim and K. J. Hole have studied how personal information leaks from large online systems in Norway, developed proof of concept software to demonstrate the seriousness of the problem, and suggested how to improve the situation.
A. N. Klingsheim and K. J. Hole, “Identity Theft: Much too Easy? A study of Online Systems in Norway,” presented at 12th International Conference on Financial Cryptography and Data Security (FC08), Cozumel, Mexico, January 28-31, 2008. Published in Lecture Notes in Computer Science.
The FC08 presentation contains screen shoots of the proof of concept software.
More information can be found in a technical report.
A. N. Klingsheim and K. J. Hole, “Personal Information Leakage: A Study of Online Systems in Norway,” Report No 370, Department of Informatics, University of Bergen, February 2008.