On the same day Tails 0.10 was put out, our website started to use a commercial SSL certificate. This new certificate replaces the previous one that was delivered by the non-commercial [CACert certificate authority](http://www.cacert.org/).
SSL certificates try to solve this problem. A SSL certificate is usually issued by a certificate authority to certify the identity of a server. When you reach a website your web browser might trust an SSL certificate automatically if it trusts the authority that issued it.
Commercial certificate authorities are making a living out of selling SSL certificates; they are usually trusted automatically by most of the browsers.Other non-commercial authorities, such as [CACert](http://www.cacert.org/), need to be installed by the operating system or by the user to avoid displaying a security warning when visiting the website.
