I want to implement digital signature of invoices in SAP R/3.
I dont't know if it's possible to sign (with certificate X.509) SAP Documents (like invoice) and what's the procedure.
I have read something about SSF but I don't clearly understand what to sign (SAP Document Invoice, a PDF/XML generated with de invoice data, how to archive the signed documents) and if it's necessary to use an external product/software to integrate this scenario.
I need to sign the documents from an Enterprise Portal with a certificate installed into Internet Explorer.
Is it possible (with an R/3 4.6C an EP 6.0)?
Where are the documents archived?