decryption and key update server (DKUS)

The service and/or dedicated appliance responsible for managing keys and decrypting messages sent from the meters to the OpenWay Collection Engine (CE). The DKUS generates, stores, and provides meter and system keys for meters upon registration and authentication. It manages key states for command, revocation, system, and meter keys, and communicates with the signing and encryption server (SES) using the DKUS daemon. The DKUS assigns multiple keys of each type to a meter: four meter keys and two of each other type of key. Only one key of each type (known as the active key) is in use at any given time. All other keys are in stand-by until activated.