Adobe Acrobat 8 3D Manual de usuario descargar pdf (Pagina 274)

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ADOBE ACROBAT 3D VERSION 8

User Guide

Theadvantageofsecuringdocumentswithcertificatesisthatauthorscanspecifyuniquepermissionsforeachgroup

in their company. For example, authors can permit employees to sign and fill forms, and permit managers to edit text

or remove pages. When you encrypt a PDF using a certificate, you specify a list of recipients and define each

recipient’s level of access to the file—for example, whether the recipient can edit, copy, or print the file. You can

specify certificates from your list of trusted identities, from files on disk, from an LDAP server, or from the Windows

certificate store (Windows only). Be sure to include your own certificate in the list so that you are later able to open

the document.

Note: If possible, encrypt documents using certificates from third-party digital IDs. If the certificate is lost or stolen, the

issuing authority can replace it. If a self-signed digital ID is deleted, all PDFs that were encrypted using the certificate

from that ID are forever inaccessible.

Ifyouneedtoencryptalargenumber ofPDFs,usetheBatchProcessingcommandtoapplyapredefinedsequence,

or edit an existing sequence to add the security features you want. You can also save your certificate settings as a

security policy and reuse it to encrypt PDFs.

1 Do one of the following:

• Click the Secure button in the Tasks toolbar, choose Show Security Properties, and then choose Certificate

Security from the Security Method menu. (Use this method if you want to save your settings as a security policy.)

• Choose Advanced > Security > Certificate Encryption.

• Click the Secure button in the Tasks toolbar, and choose Certificate Encryption.

2 In the Certificate Security Settings dialog box, specify whether to save your settings as a policy or discard them

after applying (if available).

3 Select which document components to encrypt.

4 From the Encryption Algorithm menu, choose 128-bit AES or 128-bit RC4. If you select 128-bit AES, Adobe

Acrobat 7.0 or later or Adobe Reader 7.0 or later is required to open the document. Click Next.

5 Select the digital ID you want to use.

6 Create a recipient list for the encrypted PDF: Click Search to locate identities in a directory server or in your list

of trusted identities, or click Browse to locate the file that contains certificates.

7 In the Recipients list, select the recipient(s) for whom you wish to set levels of access, click Permissions, and click

OK in the Acrobat Security dialog box. Then select the levels of access. If you don’t set permissions, recipients have

full access by default.

8 Click OK to implement your settings, and then click Next. Review your settings and then click Finish.

When a recipient opens the PDF, the security settings you specified for that person are used.

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Adobe Acrobat 8 3D Manual de usuario Pagina 274