1. U.S. Department of Health & Human Services, Health Insurance Portability and Accountability Act of 1996 (HIPAA) Privacy Rule, 1996.
2. International Medical Informatics Association (IMIA), IMIA Code of Ethics for Health Information Professionals, 2002.
3. Directive 95/46/EC on the protection of individuals with regard to the processing of personal data and on the free movement of such data;European Commission;Official Journal of the European Communities,1995
4. k-Anonymity: a model for protecting privacy;Sweeney;International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems,2002
5. Towards an analysis of onion routing security;Syverson,2000