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Transfering an X.509 private certificate to smart card

In firefox, select Edit -> Preferences. Click on Advanced tab, Encryption tab and View Certificates button:

The certificate "CAcert WoT User" is managed in the Software Security Device, which is a software safe.

Click on Backup and export the certificate to disc in PKCS12 format. You may choose a file with p12 extension, for example cacert.p12. You will be asked to enter a password to protect the file.

Make sure to backup this file, then click Delete:

Click Import to import the cacert.p12 file.

Select to store the certificate in the smart card, which is the line "François Pérou (User PIN)" in our example :

Enter the password used to encrypt the backup file:

The X.509 certificate was transferred to smart card:

This results in the following dialog:

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