Fecha de publicación: 07/09/2007 Fuente: Wipo "digitalization" Embodiments of the present invention provide methods and systems for methods and apparatuses for generating digital signatures of digital contracts, such as digital health care contracts. More specifically, embodiments of the present invention provide methods and systems for generating and using cascading digital signatures to identify a digital contract, enabling the digital contract's integrity to be assured, and rendering the digital contract non-repudiative.