Security - Adobe Acrobat and PDF for Architecture, Engineering, and Construction - page 144

Figure 10.28 Comparing pages in two versions of a document side by side
Summary
In this chapter we examined Acrobat security, looking at the two most common types of security used in
Acrobat - passwords and certificate security.
Passwords can be used for controlling access to a document, or to prevent changes to specified content.
Certificate security uses digital signatures to control both the certification and the signing of a document for
security purposes.
Acrobat includes several methods for applying signatures, verifying their content, as well as
exchanging, extracting, and importing certificates. Digital IDs can be applied in a number of ways; their
appearance on the document can be invisible, use standard content, or use a custom signature appearance.
You can manage and control Trusted Identities in a number of ways. To streamline your workflow,
create policies that can be applied to a document or an eEnvelope. Regardless of the type of document
being examined, and its signature status, you can compare different versions of the document.
Exercises
1. Using the method outlined in the chapter, construct and save a digital signature.
2. Use the signature constructed in Exercise 1 to digitally certify a document; use the signature to
digitally sign a document.
3. Manipulate certificates - exchange certificates, extract a certificate from an existing signature,
request a certificate by email.
4. Create a custom signature appearance.
5. Encrypt attachments to a document using an eEnvelope.
6. Using several versions of a signed document, compare the contents and generate a report.