  Most cryptocurrency systems or systems based on blockchain technology are
currently using the elliptic curves digital signature algorithm (ECDSA) on the
secp256k1 curve, which is susceptible to backdoors implemented by the curve
creator (secp256k1). The paper proposes a multiple elliptic curves digi-tal
signature algorithm (MECDSA), which allows not only for setting the number of
elliptic curves according to practical security requirements, but also for
editing the parameters of each elliptic curve. The performance analy-sis proves
that the scheme is secure and efficient, and can avoid any back-doors
implemented by curve creators. We suggest that the systems based on blockchain
should operate in two elliptic curves considering the contradic-tion between
security and efficiency.
