QUANTUM RESEARCH GROUP
You are cordially invited to a talk to be given by:
from the School of Physics, University of KwaZulu-Natal.
SINGLE PHOTON DETECTOR ATTACKS AND THEIR COUNTERMEASURES
IN BB84 QKD PROTOCOL
Quantum Key Distribution (QKD) is an encryption technique that permits unconditionally, secure distribution ofa bit string, known as a key. Theoretically, this technique is known to be conditionally secure, thus its security does not rely on unproven assumptions about computational capabilities of an eavesdropper (normally called Eve). However, practical implementation of QKD poses some security challenges, because of imperfect devices used in practice, as opposed to ideal theoretical models.
The purpose of this talk is to provide a survey of attacks on Single Photon Avalanche Diode (SPAD) detectors in Bennett and Brassard 1984 (BB84) QKD protocol, together with their countermeasures. SPADS are chosen because they are the most frequently used Single photon detectors (SPDs) in practice. BB84 is also chosen because it is the most implemented QKD protocol. The possibility of implementing other SPDs like Quantum Dot SPDs (QD-SPDs) and Superconducting SPDs (SSPDs) instead of SPADs for BB84 applications is also investigated.
DATE: Thursday, 18th August 2011
VENUE: Seminar Room, Level 3, H-Block