To unlock all the functionalities that the CargoX Platform provides and to perform any blockchain-related actions you need to have your own digital signature (blockchain key) linked to your CargoX account. Actions that require an active blockchain key (along with proper permissions) include:
sending document in envelopes
finalizing (releasing/accomplishing or destroying) documents
Warning
Your blockchain key is your own digital signature, and you should never share that file or its encryption password with anyone. Users can register more than one key with their account, and they can use the keys independently of each other.