Your IP address together with other data is transmitted to the web server upon every visit to our website. That is necessary for technical reasons in order to transmit the response of the server to you. You receive this IP address from your internet service provider as soon as you connect with the internet. Thereafter, for a certain period of time, your provider can trace which IP address you used at a specific date. At least theoretically your identity can be determined via an enquiry of the provider.A record is made of the server logs (IP address and additional data such as date, time of the request, name and URL of the requested file, volume of transferred data, notification of whether the request was successful, identification data of the browser used and of the operating system, as well as in the event of access via a link, the website from which access occurred) in order to test the system security, for defense against and traceability of hacking attacks, for technical system administration as well as for optimization of the website. An inspection of the server logs occurs only if required or in suspicious cases. A disclosure of data to law enforcement authorities occurs only in the event of a hacker attack. No further disclosure to third parties occurs. Data are not permanently stored and are erased after a period of 6 months.