Strengthen the Security of Cyberspace with Device-Independent Quantum Randomness

With the advancement of the information age, the risk of information security keeps increasing. Randomness is the core of network and information system security, and it is the basic support of the entire network trust system. In this paper, we introduce the concept of Device-Independent Quantum Random Number Generator (DIQRNG), which provides randomness with the highest security level. To better integrate with Information and Communications Technology (ICT) systems, we propose the principle and architectural framework of a randomness beacon based on DIQRNG. It is a public service that can be applied in multiple scenarios, such as contract signing and confidential disclosure. Its related application cases are also currently being studied in the ITU QIT4N focus group.