Protection of Data Groups from Personal Identity Documents

                            P.Kubiak, M.Kutylowski, W.Wodo,
                            Wroclaw University of Technology  

For personal identity documents, we propose a procedure of presenting a signed 
face image of the document holder. Our goal is to authenticate the image by document issuer, 
but at the same time to prevent misuse of this high quality digital data. As the signature 
is recipient dependent, illegitimate transfer of the signature to third parties is strongly discouraged.
Despite that the document issuer is the signatory and that the image recipients are unpredictable in advance, 
only a very limited amount of information has to be stored on a chip of the personal identity document.
Moreover, the solution prevents creating additional signatures by document issuer, 
as a signature created outside the card leads to a mathematically strong proof of a fraud.
 
Although the solutions presented below are aimed at protecting biometric data,
they may be used to protect any authenticated data.