Abstract
In this paper, a new notion which we call oblivious scalar-product protocols is introduced and formalized. We then propose an efficient implementation of oblivious scalar-product protocols based on homomorphic cryptographic primitives (e.g., homomorphic encryptions and homomorphic commitments). Finally we show that our implementation is provably secure assuming that the underlying Fujisaki-Okamoto's commitment scheme is statistically hiding and computationally binding, and Paillier's encryption scheme is semantically secure in the common reference string model.
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