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javadigital-signaturepades

Signature PADES sequential or parallel

In signature CAdES it's possible create multiple signature sequential or parallel.

Signature parallel: in case of contract, when more people have to sign the same document. Each people sign the same document, and each signature is added to document.

Signature sequential: where person sign the entire document (signature including) previously signed from another person.

My question is: in signature PAdES it's possible to create signature parallel? For signature PAdES we use itext.

Solution

  • No, it is not possible, PAdES signatures are always sequential. Each signature is made on the current version of the document

    Take a look to the ETSI TS 102 778-1 PDF Advanced Electronic Signature Profiles

    4.4 PDF serial signatures

    pades

    Signatures applied in parallel are currently not supported