Cryptograph key distribution with elliptic curve Diffie-Hellman algorithm in low-power devices for power grids

Power grid networks, that use symmetric ciphers for secured communication, need some system for key
distribution. It might be a special secured channel or a method which allows key-distribution via public channel.
The public channel method could be done with asymmetric ciphers, but the growing computing and power
requirements of modern ciphers are problematic for low-power devices, which are used in this kind of networks
and which should provide sufficient security for communication. This article deals with the implementation of the Diffie-Hellman algorithm over elliptic curves for ultra-low-power devices, used in power grid and smart grid
networks. The algorithm uses elliptic curves over the prime field. Our method might be used for key-distribution via public channels without any other equipment or devices.