Convergence Protects Against Fraudulent Web Security Certificates, November 03, 2011 Recent problems with certificate authorities have exposed major problems with the trustworthiness of Web browser security. Rather than simply trusting a signed SSL certificate, Convergence, a free Firefox extension, checks with several trusted certificate sites, or notaries. If all of the notaries agree that the certificate is accurate, Convergence gives the go-ahead to use the site.
Notaries in Convergence are the trusted services that the tool uses to check the validity of a certificate. The tool comes with some pre-defined notaries, and users can add their own.