Oblivious Transfer over Wireless Channels

TL;DR

This paper proposes a physical layer scheme for oblivious transfer over wireless channels, leveraging channel properties to enable secure, oblivious file transfer without the sender knowing the receiver's choice.

Contribution

It introduces a novel physical layer approach for oblivious transfer over wireless channels where only the receiver knows the channel state, ensuring privacy and security.

Findings

Enables oblivious transfer over wireless channels using channel properties.

Ensures the receiver learns only the requested file, not the other.

Works over OFDM and MIMO systems with noise-free channels.

Abstract

We consider the problem of oblivious transfer (OT) over OFDM and MIMO wireless communication systems where only the receiver knows the channel state information. The sender and receiver also have unlimited access to a noise-free real channel. Using a physical layer approach, based on the properties of the noisy fading channel, we propose a scheme that enables the transmitter to send obliviously one-of-two files, i.e., without knowing which one has been actually requested by the receiver, while also ensuring that the receiver does not get any information about the other file.