چكيده به لاتين
The reliability of a smart energy grid depends on stability and the security of both control system and communication system. The connections of a smart grid should be high secure and reliable; besides, to prevent vulnerabilities and security breaches advanced secure protocols should be exist. Important applications in smart energy grids have some limits in the critical time. On the other hand, authentication in critical time and issuing control commands are key factors. Previous methods in physical layer authentication deals with high processing time which make them useless in the critical time applications of smart energy grids.
Many investigations have been done in the area of authentication with derivation of the physical layer properties, but the requirements of smart energy grids were not considered in them. Using the mentioned properties to authentication leads to decreasing of communication and computational overhead and improving the security. According to mentioned reasons, some methods in mutual authentication in smart energy grids were introduced. In the first and second methods, initial, a general key-based model was applied. Then, in the first method, physical layer authentication based on offset frequency approximation was introduced. For the second authentication method, the approximation of offset frequency in Kalman filter was studied. In the third model, challenge-responce method was applied in mutual authentication. Then, a key as an offset frequency of each frame was used and the frequency was process in the receiver. All of the three suggested methods were secured against both active and passive attacks in real applications. Moreover, their low communication and computational overhead could lead to desirable performance of smart grid critical time uses. The second and third models are more suitable for low SNRs; hence, a complete authentication was achieve in SNR=0 dB using the second method and a zero error byte was resulted in SNR=-12 dB by using the third method.
