RLK-1 is a hardware license key connected to the computer network on which the licensed software runs. Communication with RLK-1 is encrypted using AES128b CBC EtM algorithm. RLK-1 is typically used when installing licensed software on virtual machines. The device is housed in a DIN rail-mounted enclosure. RLK-1 is supported starting from VISO v2.0.8 and RCP Master v4.0.10.