Anonymous Oblivious Transfer

TL;DR

This paper introduces anonymous oblivious transfer, a new cryptographic primitive that is more powerful than traditional oblivious transfer, enabling robust multi-party protocols without assumptions on collusions, and discusses its realizations via broadcast and quantum cryptography.

Contribution

It presents the concept of anonymous oblivious transfer, demonstrating its superiority over standard oblivious transfer and exploring practical realization methods.

Findings

All functions can be realized with anonymous oblivious transfer in multi-party protocols.

No assumptions on collusions are needed for secure implementation.

Potential realizations include oblivious broadcast and quantum cryptography.

Abstract

In this short note we want to introduce {\em anonymous oblivious transfer} a new cryptographic primitive which can be proven to be strictly more powerful than oblivious transfer. We show that all functions can be robustly realized by multi party protocols with {\em anonymous oblivious transfer}. No assumption about possible collusions of cheaters or disruptors have to be made. Furthermore we shortly discuss how to realize anonymous oblivious transfer with oblivious broadcast or by quantum cryptography. The protocol of anonymous oblivious transfer was inspired by a quantum protocol: the anonymous quantum channel.