![]() DETEC: Federal Department of the Environment, Transport, Energy and Communications.EAER: Federal Department of Economic Affairs, Education and Research.DDPS: Federal Department of Defence Civil Protection and Sport.FDJP: Federal Department of Justice and Police.FDHA: Federal Department of Home Affairs.FDFA: Federal Department of Foreign Affairs.Click OK in the trust settings pop-up dialog, and then click OK.ĭid you find it helpful? If yes, share your experience with us: Join the conversation here.Federal Office of Information Technology, Systems and Telecommunication In the Certificate Viewer dialog box, click the Trust tab, and then click Add To Trusted Certificates.ĥ. In the Signature Properties dialog box, click Show Signer's Certificate. Right-click the signature, and then click Show Signature Properties.ģ. Click the Signatures button in the left-pane.Ģ. To add the certificate that was used to apply the digital signature into Adobe’s list of Trusted Identities, do the following:ġ. You will not be able to manually validate the signature until the certificate is trusted by Adobe. If you open such a PDF, you will see a warning At least one signature has problems.įor security reasons, Adobe does not recommend adding a self-signed certificate, or any random certificate to Adobe's list of Trusted Identities. A self-signed certificate is a certificate that you have generated yourself using a third-party application. ![]() NOTE: If the signature status is invalid, contact the signer about the problem.įor more information about signature warnings and valid and invalid signatures, see the Digital Signature Guide at Trust a signer’s certificateĭigital signatures that were added using a self-signed certificate cannot be automatically validated by Adobe as the certificate is not in the list of Trusted Identities that Adobe uses to validate signatures. If the document was modified after it was signed, check the signed version of the document and compare it to the current version. Acrobat and Reader display an alert message when validating signatures with expired timestamps.ĥ. For details about the signer’s certificate, such as trust settings or legal restrictions of the signature,Ĭlick Show Signer’s Certificate in the Signature Properties dialog box. To let Acrobat or Reader accept an expired timestamp, select Use Expired Timestamps in the Signature Verification Preferences dialog box ( Preferences > Signatures > Verification: More). This message is displayed if the timestamp signer's certificate expires before the current time.
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