1. Open the PDF containing the signature.
Securing PDFs with certificates Part 2
Add a certificate from a digital signature in a PDF
You can safely add a certificate to your trusted identities from a signed PDF by first verifying the fingerprint with the originator or the certificate.
- 2. Open the Signatures panel, and select the signature.
3. On the Options menu, select Show Signature Properties, and then select Show Signer’s Certificate.
- 4. If the certificate is self-signed, contact the originator of the certificate to confirm that the fingerprint values on the Details tab are correct. Trust the certificate only if the values match the values of the originator.
5. Select the Trust tab, select Add To Trusted Certificates, and select OK.
6. In the Import Contact Settings dialog box, specify trust options, and select OK.
Set up Acrobat to search the Windows certificate store (Windows only)
- 1. Select Preferences > Signatures. For Verification, click More.
- 2. Select the desired options under Windows Integration, and click OK twice.
Trusting certificates from the Windows certificate store is not recommended.
Import certificates using the Certificate wizard (Windows only)
If you use the Windows certificate store to organize your certificates, you can import certificates using a wizard in Windows Explorer. To import certificates, identify the file that contains the certificates, and determine the file location.
- 1. In Windows Explorer, right-click the certificate file and choose Install PFX.
- 2. Follow the onscreen instructions to add the certificate to the Windows certificate store.
3. If you're prompted to validate the certificate before installing it, note the MD5 and SHA1 digest values (fingerprint). Contact the originator of the certificate to confirm that the values are correct before you trust the certificate. Select OK.
Verify information on a certificate
The Certificate Viewer dialog box provides user attributes and other information about a certificate. When others import your certificate, they often want to check your fingerprint information against the information they receive with the certificate. (The fingerprint refers to the MD5 digest and SHA1 digest values.) You can check certificate information for your digital ID files or the files you import.
For more information about verifying certificates, see the Digital Signatures User Guide (PDF) at www.adobe.com/go/learn_acr_security_en.
The Certificate Viewer dialog box provides the following information:
Certificate validation period
Intended use of the certificate
Certificate data, such as the serial number and public key method
You can also check if the certificate authority has revoked the certificate. Certificates are usually revoked when an employee leaves the company or when security is compromised in some way.
Verify your own certificate
1. Navigate to Preferences > Signatures. In Identities & Trusted Certificates, and select More.
2. Select your digital ID, and then select Certificate Details
.
Verify information on the certificate of a contact
1. Select the Signatures pane and choose the signature. In the Options menu, select Show Signature Properties.
- 2. Select Show Signer’s Certificate to see details of the certificate.
Delete a certificate from trusted identities
1. Navigate to Preferences > Signatures. In Identities & Trusted Certificates, and select More.
2. Select the certificate, and select Remove ID.
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