How to check whether the site is installed SSL certificate?
First, let's look at what is SSL certificate ? SSL certificates on a server generally refers to a digital certificate SSL Secure Socket Layer protocol. A security protocol is implemented in the transmission protocol (TCP / IP), using public key technology, which is a TCP / IP connection to provide data encryption, server authentication, message integrity and optional client authentication. So how to check whether the website SSL certificate is installed?
If you use https: // to access a Web site, indicates that this site is deployed SSL certificate. Generally speaking, if this site is deployed SSL certificate, then the page will automatically be encrypted from http: // becomes https: //, if not changed, do you think this page should be encrypted, you can try manually directly http behind the browser address bar, plus a carriage return after the letters "s", if normal access and a security lock, it means that the site is actually deployed SSL certificate, but this page does not do https: // link ; If you can not access, it indicates that this site is not to deploy SSL certificates.
SSL certificates by the browser in the "Trusted Root Certification Authorities" issued after verifying the identity of the server with Web site authentication and data encryption transmission dual function.
Note: If the SSL certificate is self-signed, that is, not by the browser in the "Trusted Root Certification Authorities" issued, the browser will have safety warnings to the browser as shown in the warning message is "This certificates website's security certificate is not issued by a trusted certificate authority, a security certificate problems may indicate an attempt to fool you or intercept any data you send to the server, we recommend that you close this webpage and do not continue to this website. "
