This FAQ covers common questions about viewing certificates, importing certificates, and maintaining certificate validity, along with 4 glossary terms.
FAQ
How do I view certificate details?
- Open a PDF file and go to the Protect tab.
- Click Certificate Management to open the certificate list.
- Select the target certificate in the list.
- Click Details to view the full certificate information.
What should I do if a certificate has expired?
- Confirm that the certificate is past its validity period.
- Contact the certificate issuer to renew or replace the certificate.
- Import the updated certificate back into Certificate Management.
- Remove the old certificate if it is no longer needed.
How do I import a certificate sent by someone else?
- Save the certificate file to your local device.
- Open Certificate Management and click Add.
- Select the certificate file you received.
- Complete the import prompts and confirm that the certificate appears in the list.
Why can’t I use a certificate after importing it?
- Check whether the file format is .pfx, .p12, or .cer.
- Check whether the certificate password was entered correctly.
- Confirm that the certificate is still valid and suitable for the current signing or encryption task.
- If needed, delete the certificate and import the correct one again.
Glossary
| Term | Definition |
|---|---|
| Signature certificate | A certificate used to digitally sign a PDF file so the signer identity and document integrity can be checked. |
| Encryption certificate | A certificate used to encrypt a PDF file and help restrict unauthorized access. |
| Trusted certificate | A certificate recognized as trusted in the current environment and commonly used for validation or trust relationships. |
| Certificate password | A protection password required when importing some certificate files. |