13. The system as recited in claim 1 , further comprising an insertion portion in the to be signed electronic document for receiving the signature data structure, digital signature, and signature authority digital certificate to form the digitally signed electronic document.
13. The system as recited in claim 1 , further comprising an insertion portion in the to be signed electronic document for receiving the signature data structure, digital signature, and signature authority digital certificate to form the digitally signed electronic document. 14. The system as recited in claim 13 , wherein the insertion portion for the digital signing signature in the to be signed electronic document is indicated by a field identifier.