An improvement of a elliptic curve digital signature algorithm
The elliptic curve digital signature algorithm ECDSA is the first successful algorithm based on elliptic curve and it is elliptic curve analogue of digital signature algorithm DSA. The security of this algorithm relies on intractability of elliptic curve discrete logarithm problem ECDLP. This algorithm has been also used for low computational capacity devices like ATM cards and smart card, because of their short key and low computational cost. In this paper, we analyse the Junru's ECDSA and improve his scheme by using two random numbers for signature generation. This will reduce the probability of risk of exposure of secret key. Therefore, the improved scheme can enhance the security of the Junru's ECDSA.