We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by Shocking

Shocking
Shocking
more options

I have imported our AD Enterprise Certificate into Firefox but it continues to give the error; 

"Insecure connection: Invalid security certificate" to the web certificates we issue.

"The certificate is not trusted because it was signed using a signature algorithm that was disabled because that algorithm is not secure." "Error code: SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED" IE and Chrome do not give any errors regarding these same certificates. How can I find out what "CERT_SIGNATURE_ALGORITHM" is causing the error?

I have imported our AD Enterprise Certificate into Firefox but it continues to give the error; "Insecure connection: Invalid security certificate" to the web certificates we issue. "The certificate is not trusted because it was signed using a signature algorithm that was disabled because that algorithm is not secure." "Error code: SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED" IE and Chrome do not give any errors regarding these same certificates. How can I find out what "CERT_SIGNATURE_ALGORITHM" is causing the error?

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

What are the connection details in Google Chrome if you click the padlock in the location/address bar?

The Page Info window shows this for the Mozilla Support website.

  • Connection Encrypted (TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, 128 bit keys, TLS 1.2)
Shocking
Shocking Question owner
more options

Google displays the Secure Lock.

I have uploaded images of the Certificate details from IE.

I think it may be the that the “Thumbprint Algorithm” is sha1?