Local Authentication Unit (LAU) application secures the messages during transfer between the back office (BO) applications and the SWIFT Alliance Interface. It is a code which will be calculated based on an algorithm taking into account a predefined key and the body of the message. It is quick to implement and maintain and it requires minimum changes on the level of the BO application.
AEG LAU, developed by Allied Engineering Group, is a tool to calculate the Local Authentication Unit for a message to authenticate it with the SWIFT interface. It can be called by the back-office applications to calculate and insert the LAU into the SWIFT message trailer or to check the correctness of received LAU codes.