On Unconditional Security from the Gaussian Channel

Stefano Pirandola, Samuel L. Braunstein, Seth Lloyd

Motohiko Isaka

We propose to achieve an information theoretically secure oblivious transfer using lattice partitions based on the additive white Gaussian noise channel. A protocol is presented and the security and efficiency is discussed.

곽승현

Motohiko Isaka

We study the use of the additive white Gaussian noise channel to achieve oblivious transfer which is an important cryptographic primitive in multiparty computation. An efficient protocol for unconditionally secure oblivious transfer is presented. We show that channel input alphabets with a certain algebraic structure and their partitions are useful in achieving privacy for players and ensuring high efficiency of the protocol. Security and information theoretic efficiency of the protocol is investigated.

Motohiko Isaka

In this paper, we consider an information theoretically secure cryptographic primitive known as oblivious transfer based on noisy channels. We present a protocol and two approaches to base the primitive on much wider class of signal sets and continuous channels than the existing results on the Gaussian channel. We also evaluate the associated information theoretic efficiency of the protocol for some cases of interest.

Noboru Watanabe