Emerging communication and cryptography applications call for reliable, fast,
unpredictable random number generators. Quantum random number generation (QRNG)
allows for the creation of truly unpredictable numbers thanks to the inherent
randomness available in quantum mechanics. A popular approach is using the
quantum vacuum state to generate random numbers. While convenient, this
approach was generally limited in speed compared to other schemes. Here,
through custom co-design of opto-electronic integrated circuits and
side-information reduction by digital filtering, we experimentally demonstrated
an ultrafast generation rate of 100 Gbps, setting a new record for vacuum-based
quantum random number generation by one order of magnitude. Furthermore, our
experimental demonstrations are well supported by an upgraded device-dependent
framework that is secure against both classical and quantum side-information
and that also properly considers the non-linearity in the digitization process.
This ultrafast secure random number generator in the chip-scale platform holds
promise for next generation communication and cryptography applications