A Novel Security Methodology for Smart Grids: A Case Study of Microcomputer‐Based Encryption for PMU Devices

Abstract

Coordination of a power system with the phasor measurement devices (PMUs) in real time on the load and generation sides is carried out within the context of smart grid studies. Power systems equipped with information systems in a smart grid pace with external security threats. Developing a smart grid which can resist against cyber threats is considered indispensable for the uninterrupted operation. In this study, a two-way secure communication methodology underpinned by a chaos-based encryption algorithm for PMU devices is proposed. The proposed system uses the IEEE-14 busbar system on which the optimum PMU placement has been installed. The proposed hyperchaotic system-based encryption method is applied as a new security methodology among PMU devices. The success of results is evaluated by the completeness of data exchange, durations, the complexity of encryption-decryption processes, and strength of cryptography using a microcomputer-based implementation. The results show that the proposed microcomputer-based encryption algorithms can be directly embedded as encryption hardware units into PMU and PDC devices which have very fast signal processing capabilities taking into considerations the acceptable delay time for power system protection and measuring applications and quality metering applications which is 2 ms and 10 ms, respectively. While proposed algorithms can be used in TCP or UDP over IP-based IEEE C37.118, IEC 61850, and IEC 61850-90-5 communication frameworks, they can also be embedded into electronic cards, smartcards, or smart tokens which are utilized for authentication among smart grid components.

Dynamical Analysis of a Quadratic Megastable Chaotic Oscillator and Its Application in Biometric Fingerprint Image Encryption

“…Instead, chaotic system-based encryption schemes have become more popular due to the good cryptological qualities of chaotic systems, such as their sensitivity to system parameters and initial conditions, nonperiodicity, mixing, and topological transitivity [16][17][18][19]. For this purpose, in the literature, there are various encryption studies based on chaotic systems [12,14,20,21], hyperchaotic systems [22][23][24][25], and chaotic maps [26][27][28]. Due to the abovementioned advantages, chaotic systems have been highly preferred and studied in the encryption of physiological biometric images [14-17, 19, 24, 29, 30].…”

An Oscillator without Linear Terms: Infinite Equilibria, Chaos, Realization, and Application

“…Interestingly, the application areas were promoted by the irregular dynamics of a chaotic system [14][15][16]. Recent applications include the steganography protocol [17], the substitution box [18], secure smart grids [19], the pseudo-random generator [20], communication for IoT [21], liquid mixtures [22], and Hash function realization [23].…”