Protection relay systems employing unconditionally secure authentication codes
T. Matsumoto, Takumi Kobayashi, S. Katayama, K. Fukushima, K. Sekiguchi · 2009
The purpose of this study is to produce practical cyber security for protection relay systems using communication channels, such as pilot protection schemes or wide area protection systems. This paper describes a concept and method of effectively applying unconditionally secure authentication codes (A-codes) to such protection relay systems. From the requirements of real-time communication and long-term maintenance of protection relays, we propose a novel scheme based on A-codes having short authenticators (authentication tags) and a feasible number of keys. The efficiency of the scheme is shown by several examples of pilot protection systems and wide area protection systems. The performance and the key management of the proposed algorithm are also discussed.