关键词: 无证书, 基于身份, 双线性对, 标准模型

Abstract: Most of the current identity-based signature schemes are secure in the random oracle model, but many of them have security problem. In this paper, an efficient and provably secure identity-based certificateless signcryption scheme was proposed. The scheme was proved secue in the standard model and reduced the q-Augmented Bilinear Diffie-Hellman Exponent (q-ABDHE) problem. Compared with the known identity-based scheme in the standard model, the proposed scheme has shorter signature length and less operation.

Key words: certificateless, identity-based, bilinear pairing, standard model