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Adobe ACROBAT X STANDARD Manual

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USING ACROBAT X STANDARD
Digital signatures
Last updated 10/11/2011
Set the trust level of a certificate
In Acrobat or Reader, the signature of a certified or signed document is valid if you and the signer have a trust
relationship. The trust level of the certificate indicates the actions for which you trust the signer.
You can change the trust settings of certificates to allow specific actions. For example, you can change the settings to
enable the dynamic content and embedded JavaScript within the certified document.
1 Do one of the following:
• In Acrobat, choose Tools > Sign & Certify > More Sign & Certify > Manage Trusted Identities.
• In Reader, choose Edit > Protection > Manage Trusted Identities.
Note: If you don’t see the Sign & Certify or Protection panel, see the instructions for adding panels at “Task panes” on
page 8
2 Select a contact, and click Details.
3 Select the certificate name, and click Edit Trust.
4 In the Trust tab, select any of the following items to trust this certificate:
Use This Certificate As A Trusted Root A root certificate is the originating authority in a chain of certificate authorities
that issued the certificate. By trusting the root certificate, you trust all certificates issued by that certificate authority.
Signed Documents Or Data Acknowledges the identity of the signer.
Certified Documents Trusts documents in which the author has certified the document with a signature. You trust the
signer for certifying documents, and you accept actions that the certified document takes.
When this option is selected, the following options are available:
• Dynamic content Allows movies, sound, and other dynamic elements to play in a certified document.
• Embedded High Privilege JavaScript Allows privileged JavaScript embedded in PDF files to run. JavaScript files
can be used in malicious ways. It is prudent to select this option only when necessary on certificates you trust.
• Privileged System Operations Allows Internet connections, cross domain scripting, silent printing, external-object
references, and import/export methodology operations on certified documents.
Note: Only allow Embedded High Privilege JavaScript and Privileged System Operations for sources you trust and work
with closely. For example, use these options for your employer or service provider.
5 Click OK twice, and then click Close.
For more information, see the Digital Signature Guide (PDF) at www.adobe.com/go/learn_acr_security_en.
Signing PDFs
You can sign a document to attest to its contents or approve the document. Based on the intent, you use different types
of signatures.
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