| Summary: | 碩士 === 南臺科技大學 === 資訊工程系 === 107 === These days, most industries use automatic systems to manage various devices. Some of them also use a network which can not only increase the efficiency of data transmission but also control devices from different places at the same time. However, many security issues of industrial systems have been noticed according to the development of the Internet. There are some attacks that may threaten industrial systems through the Internet. One of the most important systems is the supervisory control and data acquisition (SCADA for short). SCADA is a control system which is used by most industrial constructions. Related attacks to SCADA may cause the disruption of the entire industrial system. Therefore, the security of SCADA is very important.
In this paper, we aim to improve the previous systems proposed by some experts and scholars and design some secure key distribution protocols for SCADA. The protocols support broadcast, unicast, and multicast. In addition, the proposed protocols have the property of periodically updating communicated keys. These protocols keep forward secrecy, backward secrecy, and collusion resistance to prevent keys from leaking out. We also add the self-healing mechanism so that devices can update keys by themselves if the key center is broken.
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