Demonstration of a Privacy-Preserving System that Performs an Unduplicated Accounting of Services across Homeless Programs

The work demonstrates a real-world system using a multiparty computation protocol that performs an accurate unduplicated accounting across homeless programs with guarantees of privacy protection for clients of domestic violence shelters. This paper describes the goals of the project, the regulatory environment and policy goals as well as technical details and results from third-party real-world experiments. The described solution is a new multi-party protocol ("PrivaMix") that works in real-time.

L. Sweeney Demonstration of a Privacy-Preserving System that Performs an Unduplicated Accounting of Services across Homeless Programs. Data Privacy Lab Working Paper 902. Pittsburgh 2007, October 2008. (PDF 6MB).

Chapters:

• Executive Summary (PDF.)
• Need for an Unduplicated Accounting of Homeless Services (PDF.)
• The HMIS Approach (PDF.)
• Privacy Threats (PDF.)
• Assessing UID Technologies (PDF.)
• Assessment of Initial UID Technologies (PDF.)
• Impact of VAWA on UID Technologies (PDF.)
• PrivaMix, a UID Technology for VAWA (PDF.)
• The PrivaMix Demonstration System, as Used in Iowa (PDF.)
• The Iowa Experiment (PDF.)
• Identifiability of Iowa's De-duplicated Results (PDF.)
• Privacy Assurance Using PrivaMix (PDF.)