A new certificateless broadcast signcryption

作者：Sun Jin^*; Hu Yupu

来源：Journal of Harbin Engineering University, 2011, 32(5): 637-642.

DOI：10.3969/j.issn.1006-7043.2011.05.017

• Certificateless public key cryptography
• Key generation centers
• Provably secure
• Signcryption
• Standard model

Considering the characteristics of signcryption schemes with high efficiency and low computational and transmissional cost, along with the advantages of certificateless public key cryptography, a formal security model for certificateless broadcast signcryption secure against malicious-but-passive key generation center(KGC) attacks was introduced. Also, a new certificateless broadcast signcryption scheme was proposed to control the limitations of one-to-one transmission. This scheme was proven not only to be IDN-CCA2 secure under the decisional bilinear Diffie-Hellman(DBDH) intractability assumption without using the random oracles, but also to be existentially unforgeable under the computational Diffie-Hellman(CDH) intractability assumption. Furthermore, performance analysis shows that the proposed scheme is efficient and practical.

• 出版日期2011
• 单位西安电子科技大学