How to Fix CRL Is Not Yet Valid Error During PDF Signature Verification
Question details
The user encounters a 'CRL is not yet valid' warning when attempting to verify a digital signature in a PDF document, even though the revocation verification status is otherwise reported as valid.
- Product
- PDF Reader
- Device & OS
- not provided
- Scenario
- Verifying the authenticity and validity of a digital signature on a PDF document.
- Observed behavior
- The signature verification process displays an error message stating that the Certificate Revocation List (CRL) is not yet valid.
Ensure you have an active and stable internet connection, as your PDF software must communicate with the Certificate Authority's servers to verify the latest revocation lists.
Correct System Date, Time, and Time Zone Settings
The most common cause of the 'not yet valid' error is a discrepancy between your local computer's clock and the time the Certificate Revocation List was published.
If your computer's date or time is set even slightly in the past, a newly published CRL from the Certificate Authority will appear to be issued in the future, triggering this specific validation error.
Navigate to your operating system's settings panel and look for the 'Date & Time' or 'Time & Language' configuration menu.
Toggle on the options to 'Set time automatically' and 'Set time zone automatically' to force your computer to sync with a reliable global time server.
Save your system changes, completely close your PDF application, and reopen the document to trigger a fresh signature verification process.
Clear Certificate Cache and Refresh Network State
An outdated or corrupted system certificate cache might cause the PDF reader to reference invalid revocation lists.
Verify Certificate Chain and Contact the Issuer
If your system settings are accurate, the Certificate Authority (CA) might have accidentally published a CRL with incorrect validity timestamps.
Verify and Manage PDF Signatures Easily with WPS Office
WPS Office provides robust and intuitive PDF security features, allowing you to easily view, sign, and verify digital certificates in your documents without complex manual configurations.
- 1. Open PDF in WPS Office: Launch WPS Office and open the PDF document containing the digital signature you need to verify.
- 2. Access Signature Properties: Navigate to the Protect tab on the top ribbon, or click directly on the signature field within the document to view its status.
- 3. Validate the Certificate: Select 'Validate Signature' to allow WPS Office to automatically securely connect to Certificate Authorities and check real-time revocation lists.
Frequently Asked Questions
What is a Certificate Revocation List (CRL) in a PDF?
A CRL is a digitally signed list published by a Certificate Authority (CA) that contains certificates which have been revoked before their scheduled expiration date. PDF readers check this list to ensure the signature on a document is still trustworthy.
Why does the error say 'not yet valid' instead of 'expired'?
The 'not yet valid' error typically occurs when your computer's system clock is running behind the actual global time. Since the CRL was published at the correct global time, your computer perceives the list as originating from the future.
Does a CRL error mean the PDF signature is forged?
Not necessarily. A CRL validation error usually indicates a local timing issue, a network syncing failure, or a cached certificate problem rather than a compromised or forged digital signature.
Can I bypass the CRL check to open the PDF?
While you can still view the PDF contents, bypassing signature validation means you cannot legally or technically verify the document's authenticity. It is highly recommended to fix the system time rather than ignore the warning.
