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Trying to load a secure website, firefox says "Secure Connection Failed: Peer's certificate has an invalid signature."


I need to get on this website, which only allows Firefox and Safari for Mac OSX, but since I upgraded to the latest Firefox update, this is the message I get:

Secure Connection Failed

   An error occurred during a connection to teleserve.dlt.ri.gov.

Peer's certificate has an invalid signature.

(Error code: sec_error_bad_signature)


Additional System Details

Sites Affected


Installed Plug-ins

  • 20-20 Technologies - 20-20 3D Viewer for IKEA v5.0.7.0
  • iPhoto6
  • 4.0.60531.0
  • Java Plug-In 2 for NPAPI Browsers
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
  • Shockwave Flash 10.3 r181


  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:5.0.1) Gecko/20100101 Firefox/5.0.1

More Information

  • Top 10 Contributor
  • Moderator
10756 solutions 96800 answers

The site doesn't seem to be sending the correct intermediate certificate.

You can install this VeriSign intermediate certificate that works for me.

Question owner

I installed it by going into Firefox, ->Preferences-> Advanced->View certificates->Import (the certificate file). Then I restarted Firefox, and it is still not working. Any other ideas?