Mit digitalen IDs können Sie Dateien verschlüsseln, die nur von Personen geöffnet und verwendet werden können, die Zertifikate ausgetauscht haben. Zertifikatsbasierte Sicherheit hat viele Vorteile gegenüber passwortbasierter Sicherheit: Dokumente können geöffnet werden, ohne sich Passwörter merken zu müssen, Digitale IDs können nicht einfach geteilt oder kopiert werden, ein Dokument kann für jeden Empfänger einer Datei unterschiedliche Sicherheitseinstellungen enthalten. Sie können beispielsweise einer Person Bearbeitungs- und Druckberechtigungen erteilen, während eine andere Person darauf beschränkt ist, die Datei nur anzuzeigen.

Before you can receive files encrypted for your digital ID, you must create your digital ID and then share its certificate with people who you intend to share certificate-secured files. You must have also received and imported the certificate of the recipient before you can encrypt files for their use.

Note: When you use certificate-based security, remember to add your own certificate as an intended recipient. Otherwise, you will not have access to the PDF file when it is secured.

Methods to secure a PDF file with certificate security

There are two ways to secure a PDF file with certificate security. These procedures are described below.

• Certificate Security dialog: View security settings and manually apply security in Document Properties
• Security profiles: Re-usable security profiles allow you to save custom security settings and then apply those settings to a document with one click. Profiles can include details on the recipients you allow. This lets you secure documents the same way for each recipient, every time

To manage certificate security:

1. Führen Sie eine der folgenden Aktionen:
2. In the Certificate Security dialog, select contacts you want to allow access to your secured file, and click Add. To restrict usage for each recipient as you add them, select the Restricted Permissions option, and define the levels of printing and changes allowed for that person
3. Click More. In the Security Level section, specify an encryption Algorithm. 256-bit AES is considered the most secure
4. Click OK or Finish
5. Save your PDF document to apply the new security settings

To apply certificate security with a specific profile:

1. To manage security profiles, on the Protect tab, in the Secure Document group, click Manage Profiles. If necessary, create or edit a security profile before proceeding
2. On the Protect tab, in the Secure Document group, click the arrow below Certificate Security
3. Select a security profile from the list, and confirm that you want to secure the document
4. Save your PDF document to apply the new security settings