Anonymous identity-based broadcast encryption with adaptive security

Authors

Leyou Zhang, Xidian University, University Of Wollongong
Qing Wu, Xi'an University of Post and Telecommunications
Yi Mu, University of WollongongFollow

RIS ID

88164

Publication Details

Zhang, L., Wu, Q. & Mu, Y. (2013). Anonymous identity-based broadcast encryption with adaptive security. Lecture Notes in Computer Science, 8300 258-271.

Abstract

Anonymous identity-based encryption(IBE) can be used to build Public-Key Encryption with Keyword Search. But no efficient previous works in the identity-based broadcast encryption are known. In this paper, we extend the anonymous IBE definition to the identity-based broadcast encryption. Then a new construction of anonymous identity-based broadcast encryption is proposed in the standard model. In the new construction, the ciphertexts and private keys are indistinguishable for the different receivers set. The proposed scheme has constant size ciphertexts and achieves adaptive security. In addition, the security of the proposed scheme is reduced to the static assumptions in a composite group.