We firstly combine the concepts of key-insulated encryption (KIE) and identity-based encryption with the equality test (IBE-ET) to obtain identity-based key-insulated encryption with equality test (IB-KIEET). The scheme inherits the advantages of identity-based encryption (IBE), which simplifies certificate management for public key encryption. Furthermore, the key-insulated mechanism is added in our scheme, which perfectly reduces the possibility of key exposure. Our scheme achieves weak indistinquishable identity chosen ciphertext (W-IND-ID-CCA) security in the random oracle model. Meanwhile, it is indicated that our scheme is feasible and practical through the experimental simulation and theoretical analysis.
Keywords: Identity Based Encryption; Key-Insulated;
Outsourced Equality Test
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