Migrating Building Energy Management System to Public Cloud in a Secure Way

An energy management system in a commercial/industrial building (BEMS) plays an important role as a power consumer in a smart grid. But, many building facilities cannot afford the system, and a cloud service emerges as an alternative. As known, cloud services still struggle with security problems, which prevents the BEMS from being widely deployed on the cloud. This paper addresses security concerns of confidentiality, integrity, and availability in the cloud BEMS by using attribute based encryption and a cloud computing service publicly available. First, the encryption scheme assure not only scalable but also confidentiality even though the cloud is not reliable because every usage data is encrypted. The cloud Service provides security, thereby hiding the server location. Last, the cloud ensures availability. Whenever the cloud supports connections from user to server, and our implementation allows reading data from every device. Thus, when we used together, the encryption and the cloud provide the best implementation for secure smart grid computing.