Optimised elliptic curve cryptography architecture for improved V2x communication

Today’s world, communication devices installed in roadside, pedestrians, and all moving entities can able to communicate with each other, through the vehicular to anything communication called as V2X. These communications have to taken in to account security and privacy issues also. The aim of this research work is to provide secured cryptographic techniques to help the vehicles in obtaining necessary keys and information from Roadside Units (RSU), the data network, or from other vehicles while also ensuring a highest security in different ways of vehicular communication (V2I, V2V, and V2N). One of the many cryptographic methods that provide the solution to the objective is Elliptic Curve Cryptography (ECC). The fundamental operations of ECC such as point multiplication and point addition are carried out for 256-bits; also the proposed ECC processor follows the Koblitz curve secp256k1. “Divide and Conquer” is being followed in Karatsuba algorithm to increase speed of multiplication process. The incorporation of Pipelining also increases the speed of the multiplication on the ECC processor with additional area overhead. The novel Karatsuba ECC processor operates at a clock frequency of 238.40 MHz, computing point multiplication of 256-bit in 0.937 ms, throughput of 273.21kbps and area is 8.42 k slices in a FPGA Virtex-7. Integrating Pipelining in the proposed system increases the clock frequency up to 7.97%. Because of it, the time consumption is reduced by 9.90% and throughput is increased by 10.99%. This novel ECC processor performs well compared to the existing methods in terms of area-delay product, operating frequency, throughput and area.