Implementation of ECDSA using sponge based hash function

Abstract

Elliptic Curve Cryptography (ECC) is a public key cryptographic technique. Here the encryption and decryption are done in finite field either in prime mode or in binary mode. Goal of this work is to design a light weight and fast message authentication algorithm. The Digital signature Algorithm used in ECC i.e. Elliptic curve digital signature algorithm (ECDSA) uses SHA-1 as the algorithm for generating the hash code. In this paper we propose a technique of using Sponge hash for generating the hash code and signing the message with the newly generated hash code. This approach reduces the bytes per cycle time of the algorithm used in generating the hash code for authentication. when the bytes/cycle time is reduced then the energy consumption will also be reduced and the computation time is also reduced when used in resource constrained environments. abstract environment.