Acrobat JavaScript, Introduction to Acrobat JavaScript, Acrobat JavaScript Scripting Guide

Acrobat JavaScript provides a number of objects that support security. These are managed

objects for managing

certificates, security policies, and signatures. The

objects are used to manage digital signatures

and access the user certificates.

Methods for Adding Security to PDF Documents

The general procedures for applying various types of security to a PDF document are

described below. Details and examples are provided in the later sections of this chapter.

Passwords and Restrictions

The basic way to protect a document from unauthorized access is to encrypt it for a list of

authorized recipients using the

encryptForRecipients

essentially requires that the authorized recipients use a private key or credential to gain

access to it. Restrictions may be applied so that the recipients’ access to the document may

Certifying Documents

The author signature for a document is what makes modification detection and prevention

(mdp) possible. When this type of signature is applied, it is possible to certify the document,

which means that you will specify information about its contents and the types of changes

that are allowed in order for the document to remain certified.

To apply an author signature to a document, create an author signature field using the

method. Then sign the field using the

method, in which you will provide parameters containing the security

object containing an

property value other than

, and a legal attest explaining why certain legal warnings are embedded in the

object has properties common to all security handlers.

These properties are described below in

SignatureInfo Properties

Software build and version for the signature

Date and time of the signature

Security handler name specified in the

in the signature dictionary

Security handler name specified by

Acrobat JavaScript Scripting Guide