CertCheck - When you surf on the internet a lot of things happen. Many of these develop out of your control. You probably heard about "certificates". When you go to websites such as eBay or your bank, a certificate is sent to your browser to certify that you are exchanging your data with the right website and not with an attacker who wants to intercept your communication. These digital certificates are issued by Certificate Authorities (also known as CA).
Test your browser in different scenarios: