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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 Certificate from HARICA (Mail/PDF), 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. Installation of the Certificate

After you have successfully applied for and downloaded your personal Certificate from HARICA (Mail/PDF), you should have a file with the extension “.p12” (the name of the file itself is usually “Certificate” or similar).

Double-click on this file to open it.

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 with “Next”.


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In the next query, you can specify exactly which certificate should be imported. If you have already opened the correct certificate by double-clicking on it, skip this step and click “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.”


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In the following window, you can leave the check mark next to the top option and then click “Next”.


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2. 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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Next, a security warning will be displayed. If you have generated and downloaded the certificate as described in the wiki instructions, you can simply click “Yes”.


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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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INFO: If you would like to sign emails with the certificate in Outlook, please follow these instructions: 

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