A novel security key recovery framework for smart grid applications

In this paper, a combination of proper authenticated encryption protocol and the lowest outage probability of key recovery agents (KRAs) selection in key recovery system is investigated in the smart grid network for keeping confidentiality, data integrity, privacy and reliability. The novel security key recovery framework for wireless sensor networks using a KRAs selection algorithm has been proposed. First, we calculate the number of proper key recovery agents. Second, the KRAs selection algorithm is proposed that uses to select the appropriated KRA. Third, the session key will be divided by the number according to key partitioning method for recovering session key. The outage probability from the channel quality and probability of KRA failure will be considered. Fourth, DLMS/COSEM protocol and AES GCM 128-bit algorithm has been used to improve probability of Key compromising, achieving data confidentiality, privacy and authentication. The simulation results showed that the probability of key compromise and outage probability of KRAs has been improved significantly in comparison with the conventional scheme.