This paper evaluates cryptographic algorithms applied to the GOOSE protocol in IEC 61850 communication networks for electrical substations.The IEC suggest the use of RSA for digital signature of GOOSE messages andat the same time define a maximum communication latency of 3 ms for critical messages. Through practical experiments with devices with low computational power, the inviability of the RSA suggested by the IEC is confirmed. Results show that the AES symmetric cryptography algorithm with the CMAC technique meets the time constraints defined by IEC, even when the entire payload of a 459-byte packet is encrypted.
Uma avaliação de Algoritmos Criptográficos em Redes IEC 61850: Uma Abordagem Prática
