Digital Signature in Oracle Forms and Reports 12c

Hi,

We are using oracle forms and report 12c. Currently we are taking the print out of the report output and getting the signature on the same for approval. Now our management wants to avoid using papers and sign the documents digitally to enable paperless operation in our organization. So we need to

1. Generate digital Signature on click of a button in forms and save the same
2. Attach the digital signature to report output. The output of the report will be generated generally in pdf.

Please guide how to implement the solution.

Thanks in advance.

Regards,

Vishwa