Privacy Notice

Data protection information / data protection declaration

Status November 2023

The web servers of the High-Performance Computing Center Stuttgart (HLRS) are operated by HLRS, Nobelstr. 19, 70569 Stuttgart. The processed personal data are subject to the applicable data protection regulations, in particular the General Data Protection Regulation (GDPR), the Federal Data Protection (BDSG), and the State of Baden-Württemberg Data Protection Act (LDSG BW).

1. Party responsible for data protection

Universität Stuttgart
Keplerstraße 7
70174 Stuttgart
Phone: +49 711 685-0

2. Data Protection Officer

Universität Stuttgart
Breitscheidstraße 2
70174 Stuttgart
Phone: +49 711 685-83687

3. Introductory notice

This information concerning data protection / this data protection declaration relates to the web servers of the High-Performance Computing Center Stuttgart (in particular

4. Unless otherwise stated on the respective websites, personal data is gathered as follows:

4.1 Provision of the website and creation of logfiles

4.1.1 Description and categories of data

Should you access this or other websites, you transfer data to our web server via your browser. The following data is temporarily recorded in a log file whilst a connection is established:

  • IP-Address of the requesting computer
  • Date and time of access
  • Name, URL and transferred data quantity of the accessed file (in bytes)
  • Access status (requested file transferred, not found, etc.)
  • Browser type and operating system (if transferred by the requesting web browser)
  • Website from which the access took place (if transferred by the requesting web browser)

The processing of the data in this log file takes place as follows:

  • The log entries are continually automatically evaluated in order to recognize attacks against the web server and in order to be able to respond accordingly.
  • In individual cases, i.e. in case of reported disruptions, errors and security breaches, a manual analysis takes place.

In addition, when accessing websites, the date and time stamp, IP address + port (source), IP address + port (target) and the package size are recorded in the active network components of the University of Stuttgart.

4.1.2 Purpose

The temporary storage of the IP address by the system is necessary in order to deliver the website to the computer of the user. For this purpose, the IP address of the user must remain saved for the duration of the session.

Saving in a log file takes place in order to ensure the functional capability of the website. In addition, the data enables us to optimize the website and to ensure the security of our IT systems. IP addresses contained in the log entries are not combined with other data inventories, unless there are concrete indicators of a disruption to the correct operation.

The recording of active network components also enables us to ensure the security of the IT systems.

These purposes also represent our legitimate interest in the data processing in accordance with Article 6 Paragraph 1 Letter f) GDPR.

4.1.3 Legal basis

The legal basis for the temporary storage of the data and log files is Article 6 Paragraph 1 Letter f) GDPR.

4.1.4 Recipients

Should criminal investigations be initiated due to attacks against our IT systems, the data named under 4.1.1 and log files can be passed on to state investigative bodies (for example the police, criminal prosecution authorities).

The same applies if relevant authorities and/or courts make inquiries of the University and we are obliged to respond to these.

4.1.5 Storage duration

The data will be deleted once it is no longer necessary for the purpose for which it was gathered. In case of the recording of data for provision of the website, this is the case when the respective session has come to an end.

The storage of the data in log files is completely deleted after fourteen days.

4.1.6 Consequences of non-provision, right of objection and correction

The recording of data for provision of the website and the storage of data in log files is absolutely necessary in order to operate the website. Users who do not wish for their data to be processed as described can contact the University via alternative channels (by telephone, in written form, in person) in order to receive corresponding information or carry out actions.

4.2 Usage of cookies

4.2.1 Description and categories of data

In general, no cookies are generated during visits to the HLRS websites. An exception is necessary when using the “Change Contrast” function, which requires a session cookie.

4.2.2 Purpose

By activating the Change Contrast function, it is possible to switch the color of all text to black, improving its legibility and our website’s accessibility. When it is first activated, a session cookie (“contrast”) is created, saving a unique ID number. Information is connected with this ID on the server that determines which contrast setting was chosen for the display of web pages. It is necessary that this occur so that the setting is recognized and maintained when visiting other web pages.

Any user data captured to create these technically necessary cookies are not used for the creation of user profiles.

Usage of cookies for these purposes is permitted under the scope of legitimate interest in the processing of personal data according to Art. 6 para. 1 let. f of the DSGVO.

4.2.3 Legal basis

The legal basis for the processing of personal data when using session cookies is Art. 6 para. 1 let. f of the DSGVO.

4.2.4 Recipients

The recipient of the information contained in the session cookie is exclusively the authorized web server, i.e. the HLRS web server that sets the session cookie.

4.2.5 Storage duration

Session cookies are automatically deleted from your computer when you close your browser.

4.2.6 Consequences of non-disclosure, possibility of objection or elimination

The session cookie is saved on the user’s computer and is then transferred from it to our web server. This means that you as a user - independent from the requirement of saving the cookie detailed above - have complete control over the usage of cookies. By changing the settings in your internet browser, you can deactivate or restrict the passing of session cookies. Cookies that have already been saved can be deleted at any time. This can also be done automatically. If the session cookie for our website is deactivated, the contrast setting that you have selected will not be retained when visiting other web pages.

4.3 Usage of Matomo (formerly Piwik)

4.3.1 Description and categories of data

Our website uses the open source software tool Matomo (formerly PIWIK).

When individual pages on our website are visited, the following data are temporarily saved:

  • Two bytes of the IP address of the user’s system that calls the pages. (According to the settings of the software, the complete IP addresses are not saved, but instead 2 bytes of the IP address are masked (e.g., In this way, it is not possible to associate a shortened IP address with the specific computer that visited the page.)
  • The web page that you visited
  • The web page from which the visitor was referred
  • The subsequent pages that were visited from the page you visited
  • The length of time spent on the web page
  • The number of visits to the web page

The software used for these purposes runs exclusively on the servers of our website. The saving of data occurs only there. Any data collected are not forwarded to other third parties.

Personal data are only processed temporarily insofar as the complete IP address is processed until it is stored in temporary memory.

4.3.2 Purpose

The processing of users‘ personal data enables us to analyze the behavior of our users when navigating our website. Evaluating the data we collect enables us to gain an understanding of the usage of components of our website. This helps us to continually improve our website’s usability and assess how well it addresses the interests of our visitors. These purposes are permitted as a legitimate interest in the processing of data as specified in Art. 6 para. 1 let. f of the DSGVO. The users’ interest in protecting their personal data is addressed through the anonymization of their IP addresses.

4.3.3 Legal basis

The legal basis for the temporary processing of the users' personal data until the shortened IP address is stored is Art. 6 (1) let. f of the DSGVO.

5. Your rights

  • You have the right to receive information from the University of Stuttgart concerning the data saved in relation to your person and/or to have incorrectly saved data corrected.
  • In addition, you have the right to deletion or to have the processing restricted or to object to the processing.

For this purpose, please contact us via email: recht(at)

  • You have the right to complain to the supervisory authority, should you be of the opinion that the processing of the personal data relating to you breaches legal regulations.

The competent supervisory authority is the Landesbeauftragte für den Datenschutz und die Informationsfreiheit Baden-Württemberg.

Office address
Lautenschlagerstraße 20
70173 Stuttgart

Postal address
Post Office Box 10 29 32
70025 Stuttgart
Telephone: +49 711/615541-0
Fax: +49 711/615541-15

E-mail: poststelle(at)

6. Additional information relating to social media elements

On our website, components of various third-party providers are used in order to provide additional content. For example, these include YouTube videos, as well as share and like buttons of social media platforms.

If we were to directly integrate the social medial elements made available by the third-party providers into the website, then when loading the website in which they are integrated, the URL of the website which has just been loaded, the IP address and any other information (for example browser type) would be transferred to the third-party provider and cookies may be set by the third-party provider also. This would also happen if you are not registered with the third-party provider or are a member of it.

If you were also logged into the third-party provider when accessing the website, it would be able to assign additional information to your user account (for example which video you are accessing, which commentary you submit and what information you share etc.).

Therefore, it is the case that social media elements of third-party providers are not directly integrated into our websites. Rather, solutions are used which only establish a connection to the server of the third-party provider once the social element has been intentionally clicked on and only then is the associated data processing carried out.

Please bear in mind that the data processing which is carried out as a result is outside of the area of control of the university and the data protection provisions of the third-party providers must be observed.

You can find some of the data protection provisions here:

Should you not agree to data processing by the third-party provider as described above, please do not click on the social media element.

​7. Embedding of FlipHTML5

This website uses the service FlipHTML5 to enable visitors to flip through publications (e.g., our Annual Report) using an embedded player. In order for the browser to display this content, the providers of FlipTML5 must access users’ IP addresses. We have no influence on external uses of these IP addresses.

The company’s privacy policy is available at the following link:

8. Obligation to provide data

Within the scope of a business relationship, project, etc. (e.g. contract to provide computing time, or other contracts, grant agreements, consortium agreements, collaboration agreements, privacy agreements, statements of intent, etc.) you must provide any personal data that are necessary for the establishment and execution of a business relationship and the fulfillment of any associated contractual requirements, or that we are required to collect according to law.

Without these data, we must typically reject the signing of a contract and the execution of any associated activities, or will not be able to execute the requirements of an existing contact, including the possibility that it must be ended.

9. Validity and timeliness

This Privacy Notive is immediately valid and supersedes all prior statements. Further developments may make it necessary to revise this Privacy Notice. We reserve the right to change the Privacy Notice at any time with future effect, and recommend that you stay up-to-date with the current Privacy Notice. The Privacy Notice is linked in the footer of the website

The German version of this Privacy Notice is the only binding and enforceable version of this Statement.