Quantum random numbers can pass the tests and still leak clues to attackers The European Telecommunications Standards Institute’s (ETSI) technical report, ETSI TR 104 171, offers guidance on building and evaluating quantum random number generators (QRNGs). It focuses on weaknesses in the devices and their supporting systems that could make the numbers they produce less secure. Components of a QRNG (Source: ETSI) A QRNG measures a quantum process and turns