Scientists in the US have developed a novel system for generating truly random numbers, fortified against third-party manipulation.

Random numbers are essential for various applications, including unbiased jury selection and robust security algorithms. Quantum events, particularly quantum entanglement, offer a pathway to achieving true randomness. Quantum entanglement, where two particles emitted concurrently remain linked regardless of distance, enables researchers to validate the randomness of their source.

However, systems relying on entanglement can be vulnerable to spoofing if an attacker subtly manipulates measurement timings.

A study published in Nature by Gautam Kavuri, a postdoctoral student at the University of colorado, Boulder, and his colleagues, details a new system employing a publicly accessible hash chain.This substantially increases the difficulty of tampering with the recorded timings of quantum measurements. The measurement records are also available online.

In a related commentary, Peter Brown, an associate professor at France’s Institut Polytechnique de Paris, stated: “Kavuri and colleagues combine the high security of quantum random-number generation with a classical protocol that ensures not only that the output is truly random, but also that the randomness can be verified.”

“The use of traceable quantum randomness to prevent corruption and distribute resources could strengthen the public’s trust in these systems.”

The Colorado University randomness Beacon (CURBy) utilizes two entangled photons measured simultaneously at two locations 110 meters apart. The measurement sequence is publicly recorded on a hash chain, allowing observers to detect any tampering attempts.Over 40 days, the research team generated random numbers 7,454 times, achieving a 99.7 percent success rate, with 7,434 truly random numbers generated.

Brown emphasized that successfully manipulating the random-number generator’s output without detection would require compromising the entanglement measurement records and all hash chains across the experiment’s geographically dispersed locations. He noted, “Compared with previous results, the difficulty of attacking the system undetected is substantially increased.”

Brown concluded: “The use of traceable quantum randomness to prevent corruption and distribute resources could strengthen the public’s trust in these systems. In the current era of misinformation, at least we will be able to trust in randomness.”