Digital signature method for digital information uses 2 data sets and 2 signatures respectively provided by digital signing of digital information and digital signing of combined data set

摘要

The digital signature method has the digital information entered in a first data set (d1), which is digitally signed for providing a first signature (s1), a second data set (d2) provided using information relating to the first signature and/or a second signature (s2) and combined with the first data set and/or the first signature, the second signature obtained by digital signing of the combined data set (d3). Also included are Independent claims for the following: (a) a device for digitally signing of digital information; (b) a computer program for a device for digitally signing digital information