Toward protocols for quantum-ensured privacy and secure voting

TL;DR

This paper explores quantum protocols that leverage entangled states to enhance privacy and security in voting and multi-party computations, analyzing their security against dishonest actors and eavesdroppers.

Contribution

It develops and extends quantum privacy-preserving schemes, particularly for voting and multi-party function evaluation, demonstrating their potential for secure collaborative computations.

Findings

Quantum entanglement can be used to maintain privacy in voting.

The proposed schemes are secure against certain types of dishonest voters.

Quantum methods can protect privacy in multi-party group operations.

Abstract

We present a number of schemes that use quantum mechanics to preserve privacy, in particular, we show that entangled quantum states can be useful in maintaining privacy. We further develop our original proposal [see Phys. Lett. A 349, 75 (2006)] for protecting privacy in voting, and examine its security under certain types of attacks, in particular dishonest voters and external eavesdroppers. A variation of these quantum-based schemes can be used for multi-party function evaluation. We consider functions corresponding to group multiplication of $N$ group elements, with each element chosen by a different party. We show how quantum mechanics can be useful in maintaining the privacy of the choices group elements.