Robust Protocols for Securely Expanding Randomness and Distributing Keys Using Untrusted Quantum Devices
Robust Protocols for Securely Expanding Randomness and Distributing Keys Using Untrusted Quantum Devices
Randomness is a vital resource for modern-day information processing, especially for cryptography. A wide range of applications critically rely on abundant, high-quality random numbers generated securely. Here, we show how to expand a random seed at an exponential rate without trusting the underlying quantum devices. Our approach is secure against …