Asymptotically Secure Quantum Oblivious Transfer

TL;DR

This paper proposes an asymptotically secure quantum oblivious transfer protocol leveraging non-orthogonal states, overcoming known impossibility results while avoiding the need for quantum memory or entanglement.

Contribution

It introduces a novel protocol that achieves asymptotic security without requiring quantum memory or entanglement, addressing fundamental impossibility results.

Findings

Protocol is asymptotically secure against known attacks

No quantum memory or entanglement needed for honest players

Discusses relation to existing impossibility proofs

Abstract

Due to the commonly known impossibility results, unconditional security for oblivious transfer is seen as impossible even in the quantum world. In this paper, we try to overcome these impossibility results by proposing a protocol which is asymptotically secure. The protocol makes use of the basic properties of non-orthogonal quantum states. Apart from security, the advantages of our protocol include the fact that the honest players do not need to have quantum memory or create entanglement between individual qubits. The relation of our work to the known impossibility results is also discussed.