2007/11/28

PDF Digital Signatures

Introduction to PDF Digital Signatures

PDF digital signatures arises as a solution of great vitality to keep the electronic signing process in the digital sphere. The infrastructure for digital signatures exists in Acrobat, but vendors in this field have to do a lot before digital signatures in PDF become a momentous part of everyday reality. Some serious roll outs of digital signatures have taken place, for example in Belgium, but these were pretty lowly compared to the idea’s clear potential.
Almost all of paper-document workflows are rooted in filing offices and fax machines because paper is still the one document means that is certainly horizontal and still moves easily between organizations. Integrating digital signatures and electronic documents into these workflows without replacing the whole system doesn’t always attract. One of the most earnest barrier is the necessity (under the current implementation) of both sender and receiver being at least somewhat grasp to digital signatures in order to make the whole process work as aimed. Today’s digital signature technology is mainly effective in a vertically integrated environment.
Currently to put into PDF digital signature, one has to do more than just attach a signature image onto the electronic page. The good side is that the technology exists to make it all work sufficiently well. Once users create a Digital ID, design their signatures, know how to recognize a Signature field and understand what to do with it, they can sign PDF documents quickly, effectively and without paper.

Advantages of PDF Digital Signatures

PDF Digital signatures have a number of advantages over their inky ancestors:
1) A certified and signed PDF identifies itself as such when opened
PDF Digital Signatures2) Mouse-over a PDF signature to view its status
PDF Digital Signatures3) If changes have been made since signing, you’ll know
PDF Digital Signatures4) Acrobat provides information about the signature
PDF Digital Signatures5) If the document has changed, you’ll get a warning
PDF Digital Signatures6) Use any signature you like; includes graphics, text and information about your organization or location.
PDF Digital Signatures

Important about PDF Digital Signatures

Adobe's digital signature solutions in Reader and Acrobat have something for everyone. Unfortunately, even the basics get complicated pretty quickly.
First, you can’t sign just any PDF. A signable PDF file must include a Digital Signature field, the device that offers the author greater control over the future use of the document. No special skill is required to make a PDF signable – just a copy of Adobe Acrobat Standard or Professional and a minimal understanding of form fields.
Note that the free Adobe Reader cannot sign a PDF unless the PDF has been “blessed” with extended usage rights (Reader Extensions). Without such rights, every “signer” must have Adobe Acrobat, or equivalent.
Apart from using the right software or a PDF with extended rights, signing a PDF requires a Digital ID. It’s not a familiar concept, even to users who consider themselves savvy to website logins, cookies, PIN numbers and other means of online identification. Digital IDs are issued by third parties, and may also be self-signed – that is, created without a third-party certificate authority. Adobe doesn’t recommend self-signed signatures, but offers precious little information as to the distinction, why one might care, or what exactly one should do to acquire a third-party ID.