MUC (Message Unlock Code)

MUC (Message Unlock Code)used to initiate trust. If a message is sent to a new recipient, the system generates a random MUC. The sender communicates the MUC to the recipient by using another communication channel than email, e.g. personally, by phone or SMS for security reasons (Out-of-band). With the MUC the recipient gets access to the secure message and confidential documents and can download them. If the recipient has already been in contact with the sender through secure messaging and is enrolled, a MUC is no longer required.