Export the user certificate: HTW Dresden

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After application

Once successfully created, your user certificate will be in the certificate store of your operating system or browser.

In order to integrate the certificate in e-mail programmes (also on other devices), it must first be saved as a file - in other words, exported. When you create the export file, a password is used to protect the private key in your user certificate, as well as to encrypt the export file itself. This password is necessary for a successful import into an S/MIME-compatible mail programme, because only with it can the file be decrypted again. The data carrier on which the export file is located may only be accessible to you. Of course, the same applies for the password.

If you created the certificate on Windows with Google Chrome or Internet Explorer, you will need to export your certificate from the Windows certificate store.

If you have used Firefox on Windows, Linux or MacOS to create the certificate, then the certificate must be exported from Firefox's own certificate store.

After the export, you can usually import the export file into S/MIME-compatible mail programmes. Instructions for Outlook and Thunderbird are also available.

Export the certificate from the Windows certificate store

requirement

You can only export a user certificate from the Windows certificate store, if you have marked it during the import process.

(please refer Import to the Windows certificate store)

[Translate to English:] Screenshot Certmanager Starten

Press the key combination "Windows key + R", enter "certmgr.msc" in the opening window and press Enter.

[Translate to English:] Screenshot Zertifikatsmanager

It opens the Certificate manager from Windows. Now open the folder Own certificates and then click Certificates. Now select your personal certificate in the list (usually the only one) and open it by double-clicking.

[Translate to English:] Screenshot Zertifikat kopieren

Make sure that the message "You have a private key for this certificate" appears at the bottom of the window. Then select the page "Details",

[Translate to English:] Screenshot Detail Zertifikat

to export your user certificate and click on "ICopy a file ".

[Translate to English:] Screenshot Willkommen Export-Assistent

In the Certificate Export Wizard window, click "Continue".

[Translate to English:] Sreenshot: Ja privaten Schlüssel Exportieren

Choose "Yes, export private key" and confirm with "Continue".

[Translate to English:] Screenshot Privater Informationsaustausch

Make sure all settings are set as shown.

If your certificate should not be stored in the Windows certificate store after the export, then also select the option "Delete private key after successful export". Confirm with "Continue".

Deselect certificate data protection in Windows 10.

[Translate to English:] Screenshot Kennworteingabe

In the next window, you must assign a password with which the export file is protected / encrypted. Every time you want to recover your user certificate from this file in the future, this password is required.

In Windows 10 you have to select the encryption type here. Select "AES256-SHA256".

Then Click "Weiter". In the next window select the storage location and file name. Then Click "Weiter"

[Translate to English:] Screenshot Fertigstellen des Assistenten

In the last window, confirm the selected settings with "Complete". A last dialogue should confirm the successful export of your certificate. Now you can optionally transfer the file to other systems and import it into an S/MIME compatible mail programme.

For Microsoft Outlook or Thunderbird, you can use the applicable instructions from the IT Service Centre.

Export the certificate from the Firefox certificate store

[Translate to English:] Screenshot Einstellungen Firefox

Click on the menu icon and select "Settings",

[Translate to English:] Screenshot Einstellungen Zertifikat Firefox

go to "Privacy an security", then continue to "Certificates" and click on "Show certificates" to open the certificate manager of Firefox.

[Translate to English:] Sreenshot Button Sichern

In the menu "Your certificates"expand, if necessary, the list of certificates from the "Hochschule für Technik und Wirtschaft Dresden - University of Applied Sciences (FH)". Then select your certificate and click "Save",

[Translate to English:] Screenshot Exportdatei Speichern

In the window that opens, select the location and the file name for the export file.

[Translate to English:] Screenshot Eingabe Kennwort

Enter a password to protect the export file.

[Translate to English:] Sreenshot Erfolgsmeldung

After assigning a password, you should receive a message about the successful export of your certificate.

Please note that the certificate remains in the Firefox certificate store and is not usually needed there. At the latest after a successful import into a mail programme, you can delete the certificate in the certificate manager from the memory.