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supported by National Natural Science Foundation of China[grant number 61472414,61772514,61602061];National Key R&D Program of China(2017YFB1400700).
Fully homomorphic encryption(FHE)is a powerful cryptographic primitive that allows anyone to compute on encrypted data using only public information.So far,most FHE schemes are CPA secure.In PKC 2017,Canetti et al.ext...