Security Solution for SCADA Protocols Communication during Multicasting and Polling Scenario

摘要

SCADA system connectivity with several types of transport protocols and open networks make SCADA communication more vulnerable from cyber attacks. Cyber security is major problem for SCADA protocols communication included DNP3, Modbus protocol and IEC 60870-5-104 protocol. In current study, multicasting communication and polling security issues have been considered and cryptography solutions have been deployed at each end of Modbus protocol and IEC 60870-5-104 protocol as part of SCADA communication. First security implementation used AES algorithm and hashing algorithm to secure the multicasting communication of Modbus protocol and IEC 60870-5-104 protocol. Second implementation used session key and hash algorithm to secure the polling communication of Modbus protocol and IEC 60870-5-104 protocol as part of SCADA communication. During communication, authentication, integrity and confidentiality attacks have been launched and behavior of system is observed during abnormal communication.