We use cookies on some pages of our website. A cookie is a small text file that is placed on your hard drive by a website. Cookies do not pose any risk to your computer and do not contain viruses. The cookies we use on our Internet pages do not collect any personal data. We use the information collected by the cookies to make our website easier for you to use and to tailor the content you see to your needs.

Of course, it is possible to view our website without cookies. If you do not want cookies to be saved to your computer, you can disable the option in your browser's system settings. You can delete cookies saved to your computer in your browser's system settings at any time. However, if you block cookies, some functions of our website may not work optimally.

Disabling Cookies

You can accept or reject cookies by making the appropriate settings in your browser. If you disable or reject cookies, it is possible that you will not be able to use certain interactive functions on our website. Instructions on how to change your cookie settings are found under the following links. Select your browser:

Cookies Used and Their Expiration Periods

The cookies listed below are enabled when the website is visited. These are global cookies used by TYPO3 or by the analytic tools we use. In specific cases you can disable cookies in our cookie request banner. This is also where you can enable a cookie by clicking the Accept button.

Cookies for Page Analysis by Google Analytics

  • The __utma cookie is a permanent cookie that expires after two years. The expiry date is updated at every visit. This cookie can be removed completely by manual deletion.
  • The __utmb cookie is a session cookie (temporary) and expires after only 30 minutes. It is updated each time a new page is visited.
  • The _utmc cookie is no longer used by Google Analytics. However, this cookie is still written for reverse compatibility of pages which still use the urchin.js tracking code. It expires when the browser is closed.
  • The __utmz cookie is a persistent cookie. It expires after 6 months. It is only changed or updated if a visitor's traffic source changes.
  • The __utmt cookie is a persistent cookie. It is valid for 10 minutes.
  • The _ga cookie is used to distinguish users, the _gat cookie to throttle the request rate. Both cookies are also persistent, with the _ga cookie expiring after 2 years and the _gat cookie after 10 minutes.

Cookies for Page Analysis by Piwik Analytics

The persistent cookie _pk_id expires after exactly 1 year. The persistent cookie _pk_ses expires after 30 minutes.

Cookie to Check if the User Has Clicked the OK Button in the Cookie Box (Name: ZwickCookieAccept)

The persistent cookie ZwickCookieAccept expires after 30 days.