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SUMMARY:The status of device independent quantum key distribution - Jon Ba
 rrett
DTSTART:20121129T141500Z
DTEND:20121129T151500Z
UID:TALK39936@talks.cam.ac.uk
CONTACT:Paul Skrzypczyk
DESCRIPTION:The aim of device independent quantum key distribution is to e
 stablish secret key using quantum devices that are untrusted\, with securi
 ty nonetheless guaranteed by the laws of physics. This is achieved by prot
 ocols that exploit nonlocal correlations produced by measurements performe
 d on entangled quantum states. Somewhat remarkably\, the security proofs h
 old even in the extreme case that quantum devices have been manufactured a
 nd supplied by the eavesdropper herself. Most protocols for DVIQKD\, howev
 er\, are highly inefficient in that they require separate devices to be us
 ed for each entangled pair of quantum systems. I will report on recent wor
 k by myself\, Roger Colbeck and Adrian Kent that removes this requirement\
 , leading to the possibility of efficient device\nindependent protocols. I
 f time I'll also discuss the question of how to define composability of de
 vice independent protocols and describe some previously unnoticed problems
 .
LOCATION:MR4\, Centre for Mathematical Sciences
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