Adobe ACROBAT 9 Extended, Руководство пользователя

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C h a p t e r S i x t e e n Making Your Documents Secure
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Policy Servers
There are three types of policy servers you can use with Acrobat. All are avail-
able by choosing Advanced > Security Settings to open the Security Settings
dialog. Settings and access to these servers are controlled by your systems
administrator:
•
Directory server.
The VeriSign Internet Directory server is a system used
for third-party signatures and encryption. Rather than through an exchange
of certificates among individuals, your content is managed by the server.
•
Time Stamp server.
If your network or system allows for a timestamp
server, you can use the server’s capabilities to authenticate time displayed
in your documents’ signatures.
•
Adobe Policy server.
This Adobe-hosted server controls access to your
document using named users, and can track document access and versions,
set dates on documents, and apply watermarks and expiration dates.
Pick the Defaults
Save time when you are
working with secured docu-
ments by specifying default
signatures in the Security
Settings dialog. Pick one of
your signatures and click
Usage Options to open the
list. Specify the signature
as the default for these
purposes:
•
Signing a document by
selecting Use for Signing
•
Certifying a document by
selecting Use for Certify-
ing (the same icon dis-
plays if you choose both
signing and certifying
options)
•
Encrypting a file by
selecting Use for
Encryption
•
Attaching a descriptive
name to the file, by click-
ing Personalize
From the Library of Daniel Dadian