Quantum secure protocols for multiparty computations

Secure multiparty computation (MPC) schemes allow two or more parties to conjointly compute a function on their private input sets while revealing nothing but the output. Existing state-of-the-art number-theoretic-based designs face the threat of attacks through quantum algorithms. In this context, we present secure MPC protocols that can withstand quantum attacks. We first present the design and analysis of an information-theoretic secure oblivious linear evaluation (OLE), namely qOLE in the quantum domain. We showed that qOLE is safe from external attacks. In addition, it satisfies all the security requirements of a secure OLE. In the following, we utilized qOLE as a building block to construct a quantum-safe multiparty private set intersection (MPSI) protocol.