Device-independent extraction of min-entropy sources against quantum adversaries using few devices

Date: Thursday, December 22, 2022
Time: 14:00
Location: ICTQT, room 319
Passcode: 3SM3fW
seminar

Speaker: Ravishankar Ramanathan (Hong Kong)

Abstract Abstract: It is well known that classical tools do not allow the extraction of randomness from a single random source. On the other hand, quantum theory allows for such extraction even within the device-independent framework. While practically feasible protocols have been proposed for randomness sources that possess a specific Santha-Vazirani structure, it has remained an open problem to derive a finite-device protocol for extraction from an arbitrary min-entropy source. In this talk, we will present and outline the security of such a device-independent protocol with the following features: (1) robust amplification of an arbitrary min-entropy source, (2) usage of a device with a constant number of components, (3) security in the presence of a quantum adversary.