Abstract:
Aiming at the low efficiency and lack of security of some existing certificateless signature schemes, a secure and efficient certificateless signature scheme is proposed. Firstly, the scheme does not use the bilinear parings. It binds all the elements of the public key through the hash function in the key generation. Secondly, the unforgeability of the signature is proved in the random oracle model with assuming that the elliptic curve discrete logarithm problem holds. Finally, the keyless escrow, non-repudiation and forward-backward security of the scheme are analyzed. The experiment results show that the proposed scheme is more efficient and practical.