Renewal of SSL certificates
To enable secure sessions for you with browsers, organizations must install SSL certificates on their web servers. This SSL certificate is a small data file that digitally binds a cryptographic key to the details of that organization: Domain, server or host name and organization name with location are encrypted in such a way that unauthorized people cannot read them. Once a connection is established, the security lock and https protocol is activated and thus all web traffic between the web server and the web browser is secure. To secure the data transfer via our website, we use certificates from Let’s Encrypt and the DFN-Verein, the German Research Network, which are regularly renewed via the Computer Center of the University of Cologne and applied for by us. We have just completed this, the certificates on the servers have been exchanged and your data remains protected during transmission.