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Multi-party computation (MPC) allows a set of parties, each with a private input, to securely and jointly perform any computation over their inputs.
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Multi-party computation with only 1 party?
MPC is $f(E_1(a), E_2(b)) = c$, where $E$ is encryption by different keys $k_1$ and $k_2$.
Homomorphic encryption is $f(E_1(a)) = E_1(c)$, where the input and output are encrypted.
I want $f(E_1(a)) …