The invention relates to a security module characterized in that said module contains a data input port via which information can be inputted into the security module. The security module has at least two data output ports whereby data can be outputted via a first data output port and transferred to an authentication unit and whereby data can be outputted via a second data output port. Said data can be transferred to a document to be exported. Said security module has at least two combination machines. A first combination machine generates a first result value for a first data output and a second combination machine generates a result value for the second data output. The invention relates to the use of a security module for generating forge-proof documents.