Main Article Content
Security is an important parameter currently as internet communication application is growing widely. As we use large number of protocols in automation field such as Modbus, Profibus etc. Mostly used one of the protocol is open source protocol is Modbus used for large number automation industries but which does not have any security mechanism to protect the data during transmission from sensor to master node from different intrusions. In this paper we are going to discuss different threats and intrusions during data transmission through Modbus protocol and some preventive measures to avoid it.