(12) United States Patent ao) Patent No.: us 6,397,224 Bi
Zubeldia et al. (45) Date of Patent: May 28,2002
A system for anonymously linking a plurality ol data records, each data record comprising a plurality ol elements for identilying an associated individual, includes a first identity relerence encoding module configured to encode a first encoded identity relerence Irom a first subset ol the identilying elements ol a data record; a second identity relerence encoding module configured to encode a second encoded identity relerence from a second subset ol the identilying elements ol the data record; and an anonymization code assignment module configured to assign to each ol the first and second encoded identity relerences an identical anonymization code for anonymously representing the individual associated with the data record.
42 Claims, 3 Drawing Sheets