13.01.2016
Prof. Dr. Tobias Gehring Technical University Denmark, Lyngby
Organiser: Max Planck Institute for the Science of Light Gerd Leuchs
Title: Measurement and onesided deviceindepedendent quantum cryptography
Speaker: Prof. Dr. Tobias Gehring Technical University Denmark, Lyngby
Time, place: Wednesday, January 13, 2016, 3:00 p.m. Large seminar room (429/435), Bau 24, GuentherScharowskyStr. 1
Abstract: In quantum key distribution (QKD) an implementation has to follow the assumptions made in a security proof to produce a secret key that cannot be eavesdropped by exploiting sidechannels. Common assumptions of security proofs in continuousvariable QKD are among others that the local oscillator has a not been tempered and that the homodyne detectors are working properly,i.e. they are not saturated. Measurementdevice independent QKD relaxes the assumptions made on all involved detectors, thereby bacically giving the detectors into the hand of an eavesdropper. Onesided device independent QKD similarly removes assumptions on the remote detector, but keeps some assumptions on a local detector which is not accessible using the quantum channel. In this talk I will present two proofofprinciple continuousvariable experiments: An implementation of measurementdeviceindependent QKD based on coherent states and an implementation of onesided deviceindependent QKD one based on EinsteinPodolskyRosen entangled states.
