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#DOWNLOAD PDF SIGNER VERIFICATION#
#DOWNLOAD PDF SIGNER SOFTWARE#

A digital ID contains a public key certificate, a private key, and other data. It is stored in a password-protected file on a computer or network, a USB token, a smart card, etc. Digital ID: An electronic representation of data based on the ITU-T X.509 v3 standard, associated with a person or entity.By definition, an end entity certificate does not contain the basic constraint value CA. End entity certificate (EE): The signer’s certificate and the last element of a signing chain.The certificate is not self-signed, and the ICA often provides services such as policies, timestamping, revocation lists, etc. Intermediate certificates (ICAs): A type of CA whose certificate resides in the certificate chain between the end entity and root certificates.The CA signs it’s own certificate (self-signs) and its certificate is typically the “root” certificate at the top of the certificate chain.

Certificate authority (CA): An ultimate trust authority that sells or issues digital IDs (such as Verisign or Geotrust).

Some common PKI components directly related to providing trust include: Using a PKI is a method of providing a similar kind of trust. Because the notary is deemed trustworthy, you can trust the signature the notary witnesses. When signing an important paper document, a person usually signs it in front of a notary public or other trusted authority after providing them satisfactory evidence of their identity. PDF viewers that implement and conform to the PDF language specification are able to interact with all of these components in a seamless and robust way.

#DOWNLOAD PDF SIGNER SOFTWARE#

In the context of PDF signature workflows, “PKI” generally refers to the digital ID issuers, users, administrators, and any hardware or software used in those workflows. A PKI is the set of people, policies, procedures, hardware, and software used in creating, distributing, managing, and revoking, and using the digital IDs that contain the public/private key pairs used when signing a PDF. PDF’s digital signature capabilities are designed for compatibility with all the standards associated with mainstream public key infrastructures (PKI) deployed in enterprise and government settings. Creating and controlling feature-rich and secure digital signature workflows.

#DOWNLOAD PDF SIGNER VERIFICATION#

Fully trusting an electronic document by enabling verification that the signed document has notīeen altered and that it was signed by someone the recipient trusts.Moreover, government and enterprise settings often need to impose additional constraints on their signature workflows, such as restricting user choices and document behaviour during and after signing.įor these reasons, the PDF language provides mechanisms for two broad categories of tasks: However, the mere existence of a digital signature is not adequate assurance that a document is what it appears to be. Third-party developers can define their own mechanisms in the form of an Acrobat plug-in signature handler.ĭigital signatures can be used for many types of documents where traditional pen-and-ink signatures were used in the past. Adobe® Reader® and Acrobat® have implemented all of PDF’s features and therefore provide comprehensive support for the authentication of digital data based on public key infrastructure (PKI) technologies. This document describes how digital signatures are represented in a PDF document and what signature-related features the PDF language supports.

Non-repudiation- we want assurance that the author can’t deny his or her authorship.

The authenticity of the document- we want assurance that the author of the document is who we think it is (and not somebody else).

The integrity of the document- we want assurance that the document hasn’t been changed somewhere in the workflow.

Nowadays, we can use digital signatures to ensure: On different places in the workflow, at different moments in time, the document can be altered, be it voluntary, for instance to add an extra signature, involuntary, for example due to a transmission error, or deliberately, if somebody wants to create a forgery from the original document.įor centuries, we’ve tried to solve this problem by putting a so-called ‘wet ink signature’ on paper. Furthermore, this document probably has to be mailed to, viewed and stored by different parties. You don’t want people to deny the commitments they’ve written down. Such a document may contain important information about rights and obligations, in which case you need to ensure its authenticity.