Abstract:

Information-theoretic secrecy cannot be achieved from scratch but must be
based on some, ultimately physical, premise. This insight motivates the
search for the minimal price for achieving such a security level. 
Examples of realistic assumptions are noise in communication channels or 
the postulates of quantum physics. A recent result shows that there exists 
a variant of quantum key agreement which is device-independent and does not 
even rely on quantum physics if the assumption is made that no unauthorized 
information flows within, inbetween, and from the legitimate laboratories. 
One possibility of ensuring this is via the non-signaling postulate of
relativity if measurements are carried out simultaneously enough.

Short Bio:
Stefan Wolf has been a Swiss National Science Foundation (SNF) 
Professor for Quantum Information at the Computer Science Department 
of ETH Zurich since October 2005. Born in Schaffhausen, Switzerland, 
he received a Dipl. Math. ETH, followed by a PhD in Computer Science 
from ETH Zurich under the supervision of Professor Ueli Maurer. After 
a postdoc at McGill University, Montreal, he was Assistant Professor 
at University of Waterloo, Ontario, and Universite de Montreal, Quebec.

Refreshments served from 14:15 on,
 	Lecture starts at 14:30