I need an API, developed in asp.net core with good practices and security implementation, which allows me to sign and validate the electronic signature in records of a table to be provided. I need all that to follow the specification of the manual attached.
-Provide time-stamped hashed bank records
-To allow revalidation of the signature
-Allow export of signed registration
-Allow the time-stamp to be added later in case of unavailability
-Listing of pending signatures to be corrected
-Load to import already signed records with validation
-View subscription information
-Log of all actions taken, failures, errors, etc.
-Allow PDF files to be signed following the same standards
For the time-stamp I will provide an external service provider. More details when we star the project.