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Summary 

A digital signature is not the same as a message signature. A message signature is a customizable closing phrase. A digital signature, on the other hand, adds a unique code to the message that can only originate from the digital signature in the possession of the true sender (Source: Microsoft.com).

A digital certificate can protect a message from tampering and, for even greater data protection, can also enable end-to-end encryption.

A digital certificate, also referred to as digital signature, is comparable to an ID card and helps prove one’s identity on the internet.

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This guide is aimed at the following target groups:

  • Students
  • Employees
  • Employees of the university administration
  • IT responsible person of an institution
  • Secretaries

After applying for your personal S/MIME-Certificate from HARICA, you will need to install the certificate. You can follow the installation steps in the instructions on this page. 

This type of certificate is only suitable for simple signatures for emails.

Warnung

Do not perform these steps more than once!

A certificate is not interchangeable. Emails that were encrypted with a certificate can only be decrypted using the same certificate. If the certificate is lost, it will no longer be possible to verify signatures, and encrypted content can no longer be accessed. Therefore, make sure to save your certificate on your computer's home drive or on an encrypted USB stick. Also, make sure to remember the certificate password or store it in a safe place.


1. Downloading the Certificate (S/MIME-Certificate at HARICA)

To download and install an S/MIME certificate, you must first apply for it via the HARICA website.
Detailed information on how to apply can be found on the following page: personal S/MIME-Certificate from HARICA.

After successfully applying, you can download the certificate using the “Download” button and then install it.


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Now the downloaded certificate can be opened either directly by clicking on the download arrow in the top right-hand corner, as shown in the image or manually by double-clicking on it in the “Downloads” folder in File Explorer.


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2. Installation of the Certificate

In the first step of the installation, you can specify whether the certificate should be installed for the current user or for the local computer. Select the desired storage location and confirm your selection with “Next”.


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In the next step you can specify exactly where the certificate should be saved. Use the “Browse/Durchsuchen” button to manually select the storage location. Once you have specified the desired storage location, confirm your selection by clicking “Next.”

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In the following window, enter the password/passphrase associated with the certificate that you used when applying, and make sure to check the box next to “Alle erweitereten Eigenschaften mit einbeziehen/Include all advanced properties.”


3. Finalising the Certificate

This step shows you the settings you made in the previous steps. To complete the certificate, click “Finish/Fertig stellen”. If the information is incorrect, select “Cancel” and repeat the process.

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If you have successfully completed all steps and the message “The import process was successful” appears, the certificate has been successfully installed. The downloaded certificate can now be used and is available to you.

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Titel: "HARICA Zertifikat Installation in Windows"

Stand: 1829.09.2025