Fully Secure Anonymous Identity Based Broadcast Encryption with Group of Prime Order

Yang Ming ； Hongping Yuan

《International Journal of Network Security》 21卷1期 (2019/01) Pp. 7-16

https://doi.org/10.6633/IJNS.201901_21(1).02

摘要

Anonymous identity based broadcast encryption (IBBE) is a cryptographic primitive, which allows a broadcaster to transmit encrypted data over a broadcast channel to a large number of users such that only a select subset of privileged users can decrypt it and any user cannot distinguish the encrypted message to which user. In this paper, based on the asymmetric bilinear pairing, a new anonymous IBBE scheme is proposed. Under the assumption of symmetric external Diffie-Hellman, we prove that the proposed scheme is fully secure (adaptive security) in the standard model using the dual system encryption method. This construction utilizes the dual pairing vector space technique in the group of prime order to realize the parameter hiding and cancelling properties of the group of composite order. The performance analysis depict that the proposed scheme achieves simultaneously the constant size system parameters, private keys and ciphertexts. In addition, the recipient anonymity can be captured.

關鍵字

Dual System Encryption ； Fully Secure ； Group of Prime Order ； Identity Based Broadcast Encryption