During a secure connection a website needs to provide a certificate issued by a trusted certificate authority in order to ensure that the user is connected to the intended target and the connection is encrypted. If you get a "Your connection is not secure" error page and see the error code "SEC_ERROR_UNKNOWN_ISSUER" after you click on Advanced, it means that the certificate provided was issued by a certificate authority that is not known by Firefox and therefore cannot be trusted by default.
In case you get this problem on multiple unrelated HTTPS-sites, it indicates that something on your system or network is intercepting your connection and injecting certificates in a way that is not trusted by Firefox. The most common causes are security software scanning encrypted connections or malware listening in, replacing legitimate website certificates with their own.
Generally, if your security product contains a feature to scan encrypted connections, you could try to reinstall the security product, which might trigger the software to place its certificates into the Firefox trust store again.
The error occurs on multiple secure sites
In case you get this problem on multiple unrelated HTTPS-sites, it indicates that something on your system or network is intercepting your connection and injecting certificates in a way that is not trusted by Firefox. The most common causes are security software scanning encrypted connections or malware listening in, replacing legitimate website certificates with their own.
Generally, if your security product contains a feature to scan encrypted connections, you could try to reinstall the security product, which might trigger the software to place its certificates into the Firefox trust store again.
No comments:
Post a Comment