SSL Observatory

Overview
The SSL Observatory is

{{Quote|a project sponsored by the Electronic Frontier Foundation (EFF) to investigate the certificates used to secure sites encrypted with Hypertext Transfer Protocol Secure (HTTPS) on the Web.

Overview
The dataset contains all of the publicly visible SSL certificates on the Internet Protocol Version 4 (IPv4) Internet as of August 2010. The observatory data is made available as a My Structured Query Language (MySQL) database and contains 1,377,067 unique valid certificates signed by 1,482 certificate authorities.