I want to add a private key (.der) into the verify/sign tab of my own profile in TN in order to send out signed EDI documents to our client. But when I add the document I always get the following message
“The private key you tried to import is not valid.”
Did I create the wrong private key or am I doing something else wrong.
I already installed the public certificate in the partner profile and I can send out encrypted documents, it is just the signing that gives problems.
Can anyone help me pls?