1202.3571 (Dax Enshan Koh et al.)

The effects of reduced "free will" on Bell-based randomness expansion    [PDF]

Dax Enshan Koh, Michael J. W. Hall, Setiawan, James E. Pope, Chiara Marletto, Alastair Kay, Valerio Scarani, Artur Ekert

With the advent of quantum information, the violation of a Bell inequality is
used as evidence of the absence of an eavesdropper in cryptographic scenarios
such as key distribution and randomness expansion. One of the key assumptions
of Bell's Theorem is the existence of experimental "free will", meaning that
measurement settings can be chosen at random and independently by each party.
The relaxation of this assumption potentially shifts the balance of power
towards an eavesdropper. We consider a no-signalling model with reduced "free
will" and bound the adversary's capabilities in the task of randomness
expansion.

View original: http://arxiv.org/abs/1202.3571