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Data protection

The following data privacy statement applies to the use of the website www.vditz.de

We take the protection of your personal data very seriously. Your personal data are collected ad processed in accordance with the applicable data protection regulation, especially the EU General Data Protection Regulation (GDPR). We collect and process your personal data to provide you with the portal mentioned above. This declaration describes how and to what purpose your data are recorded and used and what options you have in the context of your personal data.

 By using this website, you agree to the capture, use and transmission of your data in accordance with this data privacy statement.


The controller for the collection, processing and use of your personal data within the meaning of the GDPR is:

VDI Technologiezentrum GmbH
Managing Director Sascha Hermann
VDI-Platz 1
40468 Düsseldorf
Email: vditz@vdi.de
Tel.: +49 (0) 211 62 14-4 01

If you want to object to the collection, processing or use of your data by us in accordance with these data protection provisions either completely or for individual measures, you can address your objection to the controller mentioned above. You can save and print this data privacy statement at any time.

Data Protection Officer of VDI Technologiezentrum GmbH

If you have any questions or comments with regards to our processing of your personal data, we welcome your feedback. In this case, you can contact our responsible data protection officer as follows:

Julia Rudolf
Data Protection Officer
Email: datenschutz@vdi.de

Storage of your access data

Each time a user accesses the website www.vditz.de and each time a document is downloaded from this website, access data about this action will be saved in a log file on the server.

Each data set consists of:

  • The IP address of the device that has opened the website
  •  The date and time of the request ("time stamp")
  • The name of the file
  • The access status (file transferred, file not found, etc.)
  • The amount of data which has been transferred
  • The page which has requested the file (referrer-URL)
  • A description of the type of web browser which has been used (e.g. Mozilla Firefox, Google Chrome or Microsoft Internet Explorer, Apple Safari, Opera, etc.)

The saved data are evaluated for statistical purposes; they are not transferred to third parties for commercial or non-commercial purposes.

Transfer of personal data

Your data will only be transferred from the browser to the web server following encryption. We use a SSL-certificate for this.

Contact form

The transfer of data to the web server takes place following encryption. However, the data are not saved on the web server, rather it is then sent automatically from the web server by email to the editorial team of the website. The data is only stored for as long as is necessary.

Right of information

Users have the right to receive free-of-charge information concerning saved personal data relating to them. In addition, they have the right to have this personal data rectified, blocked and erased in accordance with the statutory provision


What are cookies and how do we use them?  Cookies are small text modules which are transferred from the Internet to your computer together with the required data. This data will be saved on your computer and will be kept for later visits. We use cookies in some areas. The www.qt.eu website also contains links to external websites that may use cookies. These external websites and their use of cookies are beyond our responsibility, and we cannot inform you of this before following these links. So-called "session-cookies" are necessary, particularly for the registration process, because we use a so-called single-sign-on concept for reasons of user-friendliness during the authentication and access control to the different areas of our portal. This comprises the establishment of a "session" between the client and the server which allows you to move through the entire portal without having to re-register for each area. This session is represented by a cookie, in which a randomly generated number is saved.

In addition, your login information (user name, user rights and validity of the session) is saved in a further cookie to control your access. Think of this as substitute login information. Instead of asking you to re-enter your login information, the cookie is sent to the server and accepted as proof of your identity.

Validity of cookies

The validity of both cookies is limited to the time of your visit to our portal. They will be deleted automatically when you close the browser. They are not linked to personal data and no conclusions can be drawn about the user's activities. On explicit request, you can optionally allow permanent storage of your user name in a third cookie when registering. This facilitates the login if you frequently visit the portal as you will then only be asked to enter your password. We expressly point out the risks of this procedure as there is the danger of misuse of your login data by third parties.

Most browsers are configured to automatically accept cookies. However, you can deactivate the storage of cookies at any time or you can adjust the browser to inform you as soon as cookies are used.

Web analysis

In order to optimise this website more strongly to the needs of its users, we analyse the user behaviour of visitors to our website (e.g. what contents are particularly in demand? Which aren't?). For this, we use the web analysis service Matomo which only requires limited data (formerly: Piwik).

Matomo uses cookies to analyse the user behaviour of visitors to the website. For the analysis, the user information generated by the cookie (including the anonymised email address) are transmitted to our server and saved for later analysis and to optimise our website contents. Your IP address is anonymised even before it is sent to our server by deleting the last two blocks of numbers so that you as the user remain completely anonymous. Of course, we do not pass on the information on how visitors to our website use our website to third parties, except where we are legally obligated to do so in exceptional cases, e.g. based on a judicial request. 

​​​​​​​Objection to analysis cookies

If you do not agree to the storage and analysis of these data from your visit, you have two options of how to stop the analysis of your user behaviour:

On the one hand, you can generally prevent the use of cookies by changing the settings of your browser software; however, this may mean that you cannot use all functions of our website because your browser blocks all cookies and not just those cookies which we save on your computer for analysis purposes. Cookies are also used when you log into the exclusive member area.

On the other hand, you can also object to their storage and use at any time by clicking below. A so-called opt-out cookie is then saved in your browser so that Matomo cannot collect session data.

Note: If you delete cookies from your computer (e.g. by using the private or incognito mode of your browser), this means that your opt-out cookie will also be deleted and may need to be re-activated so that we do not save any analysis cookies on your computer.

​​​​​​​Opt-out cookie

If you want to prevent Matomo from saving a cookie on your computer, you can do this here.

​​​​​​​Legal basis and time of storage

The legal basis for data processing pursuant to the preceding paragraphs is Art. 6 para. 1 lit. f) GDPR. Our interests in the data processing are, in particular, ensuring the operations and security of our website, analysing how visitors use the website and simplifying use of the website.

 Unless otherwise specified, we only save personal data as long as is necessary for the fulfilment of the respective purposes.