Fully secure fuzzy identity-based encryption for secure IoT communications

•We proposed a new fuzzy identity-based encryption (FIBE) scheme.•We prove that our new FIBE scheme is secure in the full model without random oracles.•Our proposed FIBE scheme is more efficient than previous schemes.

How to securely transmit data is an important problem in Internet of Things (IoT). Fuzzy identity-based encryption (FIBE) is a good candidate for resolving this problem. However, existing FIBE schemes suffer from the following disadvantages: rely on random oracle models, merely secure in selective-ID model, long public parameters, and loose security reduction. In this paper, we propose a new FIBE scheme. Our scheme is secure in the full model without random oracles, and at the same time has a tight security reduction and short public parameters. This means that our scheme is quite suitable for secure transmitting data in IOT.