An efficient multi-PKG ID-based signcryption scheme

作者：Zhao Xiu Feng; Xu Qiu Liang^*

来源：Chinese Journal of Computers, 2012, 35(4): 673-681.

DOI：10.3724/SP.J.1016.2012.00673

• Bilinear pairing
• Identity-based signcryption
• Multi-PKG
• Provably secure
• Standard model

Signcryption with multiple private key generators (PKGs) can provide valid solution for authentication and confidential communication among entities in different domain. In this paper, a new identity-based signcryption scheme with multiple PKGs is proposed. We used the ideas of Waters IBE scheme and existing IBS scheme, we also employed "⊕" and hash function to eliminate the corresponding relation between plaintext message and ciphertext. Our scheme achieves CCA secure and existential unforgeability in the standard model. Moreover, when adapted in single PKG environment, our scheme is more efficient than the existing ones.

• 出版日期2012