1 Reply Latest reply on Mar 9, 2015 12:39 PM by IsakTen

    Features of Adobe Pro X/Indesign time stamped signature?


      I have adobe pro x as well as adobe indesign and I am working on a Mac.  I am creating legal liability forms that require a signature.  The documents need to hold up in court. I am looking at services from companies such as docusign, silanis and Adobe echosign for this. 


      I am having a hard time understanding the exact nature or offering of the "timestamp signature" features in adobe pro x and adobe indesign.  I am wondering if a similar timestamped signature service already comes with the two adobes I have or if I should contract with the previously mentioned outside services. 


      If the desired features I am looking for are included in the two services I have can you please help descibe what they are and how to use them in which adobe platform (adobe pro X or indesign?) 


      Hope you are having a great friday and thanks a bunch.


      Robin W

        • 1. Re: Features of Adobe Pro X/Indesign time stamped signature?
          IsakTen Level 4

          There are two kinds of electronic signatures: digital signatures and e-signatures. Digital Signatures are based on PKI certificates, e-signatures are supported by some server-based service. Generally, there are several properties that an electronic signature protects: 1. Document integrity: was the document changed since it was signed; 2. Identity: who signed it; 3. Non-repudiation: can the signer later claim that the signature was forged.

          The properties that a digital signatures protects depend on the kind of digital certificate you use for signing. If you use a so-called self-signed certificate (Acrobat can create one for you), then a digital signature signed with such certificate protects only the Integrity of the document. If you procure a digital certificate from a reputable Certificate Authority, signature signed with such certificate will protect all three properties: Integrity, Identity and non-Repudiation. The ability to check these properties is contained within the signature itself and the document which it was applied to.

          Document Timestamp Signature is a digital signature which is signed with a Timestamp Server. It attests only to the integrity of the document and also to the secure signing time. You need access to a Timestamp server (which usually costs money) in order to use it. Is this what you refer to as "timestamp signature"?

          E-signatures' ability to check these properties depends on the abilities of the service that supports them. In order to check these properties for e-signatures you need to go to the Server that supports it and to inquire. At the end of the signing workflow EchoSign can produce a digitally signed (certified) PDF which attests to the validity of e-signatures in this document. Other e-signature services may have similar functionality.

          The main difference between the Digital signature and e-Signature is that the verification of a digital signature is self-contained (you only need software that validates it) and for verification of an e-Signature you need to inquire the Service that produced it.