If you are a third party, you can acquire documentation of the authenticity of a diploma issued by Aarhus University. 

As you presumably would have done before the introduction of digital diplomas, you will receive a copy of the diploma in electronic form, for example as a PDF. Instead of asking the graduate to produce the original diploma by way of authentication, you may now ask him or her to share the diploma with you in e-Boks, and in this way authenticate that the diploma was issued by Aarhus University. 

You also have the option of asking a graduate to open his or her e-Boks and show you the diploma, for example in the context of a job interview.

e-Boks has produced a guide to the sharing feature.

 If the diploma is issued in paper format, the studies administration can be contacted for verification.