Leakage-resilient IBE from lattices in the standard model

We present an identity-based encryption in the relative-leakage model. In our construction, we firstly make use of a notion of new cryptographic primitive, identity-based hash proof system (IB-HPS), to construct a leakage-resilient IB-HPS from lattices in the standard model, which has the same amount of relative leakage as that in [11]. Then, based on our IB-HPS scheme, we construct directly an efficient leakage-resilient identity-based encryption scheme in the model.