Mediated Signatures - Towards Undeniability of Digital Data in Technical and Legal Framework

               Przemyslaw Kubiak, Miroslaw Kuty\l owski,  Anna Lauks-Dutka
                                Wroclaw University of Technology

                                               Michal Tabor
                                Trusted Information Consulting

We present an approach different from the classical framework of qualified electronic signatures
that seem to offer much better properties regarding usability, costs, risk level as well as security 
in technical sense.   Or approach is based on mediated signatures and 
chaining mechanisms that replace time stamping services.

Keywords: 
electronic signature, qualified  signature, mediator scheme, chaining, Merkle tree, undeniability

 
to be presented at 3rd Workshop on Legal Informatics and Legal Information Technology (LIT 2010)}, 
Berlin, and published in  Lecture Notes in Business Information Processing, Springer-Verlag