Site seal from SSL Certificates company DigiCert.
http://www.digicert.com/
Widgets · SSL Seals
Get access to data on 25,688 websites that are DigiCert Customers. We know of 2,988 live websites using DigiCert and an additional 22,700 sites that used DigiCert historically and 1,724 websites in the United States.
Get a list of 25,688 websites using DigiCert which includes location information, hosting data, contact details, 2,988 currently live websites and an additional 13,180 domains that redirect to sites in this list. 22,700 sites that used this technology previously and 1,724 websites in the United States currently using DigiCert.