Adobe 22002486 Digital Signature User Guide - Page 103
Setting Digital Signature Validation Preferences
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Acrobat 9 Family of Products Security Feature User Guide Validating Signatures Setting Digital Signature Validation Preferences 103 To gain a small increase in application speed when it opens a document. The difference may be negligible depending on the number of signatures and whether a system administrator has customized revocation checking. To configure automatic signature validation: 1. Choose Edit > Preferences (Windows) or Acrobat (or Adobe Reader) > Preferences (Macintosh). 2. Choose Security in the left-hand list. 3. Check Verify signatures when document is opened. 7.2.2 Setting Digital Signature Validation Preferences To set advanced digital signature preferences: 1. Choose Advanced Preferences. 2. Display the Verification tab. Verification tab options let you specify the validation plugin, default validation methods, whether or not certificate revocation checking is automatic, what time is associated with a validated signature, and whether or not a status icon appears with the signature. Figure 70 Signature verification preferences 3. Select the signature validation method (use the default setting unless instructed to change it by a system administrator): Use the document-specified method, prompt if it is not available. Use the document-specified method, use the default method if it is not available. Always use the default method (overrides the document-specified method). Tip: Don't change this setting unless instructed to do so by a system administrator. Signatures are created and validated by plugins. These options specify which plugin is used. Both Acrobat and Adobe Reader provide a default plugin for signing documents and verifying signatures. While the signing and verification usually use the same plugin, this is not always the case. However, a signature always "knows" what plugin is required to verify it. 4. If you have installed a non-default plugin, select your preferred method for verifying signatures.