The　Supervisory　Control　and　Data　Acquisition　(SCADA)　networks　provide　high　efficiency　in　various　industries　which　became　one　primary　and　specific　industrial　control　systems.　The　data　encryption　method　is　usually　applied　to　current　SCADA　system　to　improve　security.　This　paper　proposes　a　new　cryptographic　key　management　scheme　for　SCADA　networks　with　whitelist　attribute.　It　is　able　to　mitigate　varied　cyber-attack　threats.　The　session　key　update　and　master　key　update　protocol　in　this　scheme　reduces　from　three　or　two　communications　to　one　communication.　From　the　evaluation　result,　the　traffic　and　energy　consumption　of　the　session　key　update　phase　and　master　key　update　phase　drop　considerably,　while　the　QoS　increases　in　proposed　scheme.　©　2016.