Device-Independent Private Quantum Randomness Beacon

TL;DR

The paper introduces DIPQRB, a practical device-independent quantum randomness beacon that generates secure, private random numbers from untrusted devices by leveraging routed Bell tests and distributed device requirements.

Contribution

It proposes a novel DIPQRB framework that relaxes device requirements and enhances practicality for secure quantum randomness generation from untrusted sources.

Findings

Enables secure randomness from untrusted devices.

Reduces device complexity and cost.

Ensures output privacy even against the server.

Abstract

Device-independent quantum random number generation (DIQRNG) is the gold standard for generating truly random numbers, as it can produce certifiably random numbers from untrusted devices. However, the stringent device requirements of traditional DIQRNG protocols have limited their practical applications. Here, we introduce Device-Independent Private Quantum Randomness Beacon (DIPQRB), a novel approach to generate random numbers from untrusted devices based on routed Bell tests. This method significantly relaxes the device requirements, enabling a more practical way of generating randomness from untrusted devices. By distributing the device requirements across a network of servers and clients, our proposal allows the server to operate high-performance devices while the clients can be equipped with more cost-effective devices. Moreover, the outputs of the client's device are also private, even against the server, which is essential in cryptographic applications. Therefore, DIPQRB provides a cost-effective method to generate secure and private random numbers from untrusted devices.