An Efficient Key Management for Secure Multicast in Sensor-Cloud

Nowadays, in Publish/Subscribe system, the number of subscriptions from customers can be large, the events happening in such a system are more frequent and the notification load is heavy. Combining with cloud computing that is becoming increasingly popular for scalability and availability it promises, called Sensor-Cloud, there are many approaches that improve data delivery issues in such scenario efficiently. However, there are few approaches that consider secure data delivery while security plays an important role in Sensor-Cloud. In this paper, we propose an efficient secure multicast approach by combining Group-key and Time-key (CoGKTK) to minimize number of updated key for such dynamic scenario in Sensor-Cloud. We analytically show the performance and scalability benefits of our approach over data delivery infrastructure in Sensor-Cloud.