Automatic. Always enabled, there is no on/off option. Wireless HART uses two encryption keys: a network key and a session key. The network key operates at the data link layer of the protocol and is USED in communication hops between neighboring transmitter’s node-to-node. The session key operates at the network layer and is used end-to-end (over multiple hops), from the originating transmitter to GATEWAY. The intermediate transmitters cannot decode the MESSAGE. These keys are not seen by plant personnel. The system periodically rotates these keys every few DAYS, this happens automatically without human INTERVENTION.

Automatic. Always enabled, there is no on/off option. Wireless HART uses two encryption keys: a network key and a session key. The network key operates at the data link layer of the protocol and is used in communication hops between neighboring transmitter’s node-to-node. The session key operates at the network layer and is used end-to-end (over multiple hops), from the originating transmitter to gateway. The intermediate transmitters cannot decode the message. These keys are not seen by plant personnel. The system periodically rotates these keys every few days, this happens automatically without human intervention.