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With this PAdES format multiple signatures in a workflow and the visual representation of an electronic signature in a PDF document can be realised. For use within the eIDAS environment, the support of so-called “policies” by the DSS-X specification proves to be valuable.
A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]
For PDF documents, the signature data is incorporated directly within the signed PDF document, much as an ink signature becomes an integral part of a paper document, allowing the complete self-contained PDF file to be copied, stored and distributed as a simple electronic file. The signature can also have a visual representation as a form field ...
A trust service is defined as an electronic service that entails one of three possible actions. First it may concern the creation, the verification or the validation of electronic signatures, as well as time stamps or seals, electronically registered delivery services and certifications that are required with these services. The second action ...
To verify the signature, local cryptographic verification can do a quick check of integrity or the full receipt or even the original document can be retrieved from the DPM service using the XML Verify request by other parties at a later date and compared with the receipt stored with the document.
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