Identity-based ring signcryption scheme
Hongzhen Du · Journal of Baoji University of Arts and Sciences · 2009
Aim To study how to design a secure and efficient identity-based ring signcryption.Methods An efficient and provably-secure identity-based signature(IBS) scheme is proposed in this paper,and then a new identity-based ring signcryption scheme(IBRSC) based on our IBS scheme is presented.Results Using this IBRSC scheme,a sender can anonymously send a message,and the confidentiality and authenticity of the message are realized at the same time.It's proved that our IBRSC scheme is secure against adaptively chosen ciphertext attack under the computational bilinear Diffie-Hellman assumption.Conclusion Compared with the existing IBRSC schemes,our scheme achieves higher efficiency and has very short information expansion,which can be used in environments with stringent bandwidth constraints.