We need to construct an fully homomorphic encryption scheme which satisfies strong security for practical use to use a homomorphic encryption scheme practically, but essentially, we cannot construct a scheme which satisfies IND-CCA2 security Thus, one of the strongest security notions for homomorphic ...
We need to construct an fully homomorphic encryption scheme which satisfies strong security for practical use to use a homomorphic encryption scheme practically, but essentially, we cannot construct a scheme which satisfies IND-CCA2 security Thus, one of the strongest security notions for homomorphic ...
We handle both the asymmetric and the symmetric key FHE schemes, and for each we give two variations differing in whether the ciphertext integrity can be verified publicly or requires the secret key. We use well-known techniques to achieve C C A 2 extrm{CCA2} security in the first step ...