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Quantum Key Distribution with Limited Resources

15 Nov
Friday, 11/15/2019 3:45pm to 5:15pm
Computer Science Building, Room 142

Quantum key distribution (QKD) allows for the establishment of a secret key between two parties A and B, which is secure against an all-powerful adversary. This is unlike classical key distribution protocols where security requires computational assumptions to be placed on the power of the adversary. But how "quantum" must a protocol be to gain this advantage?

We will discuss our recent work in the "semi-quantum" model of communication where one party is "fully quantum" while the other has access to very limited quantum capabilities (and behaves in a very classical manner). We will also talk about recent theoretical and experimental work implementing, and analyzing, "mediated semi-quantum" protocols where both A and B have limited quantum capabilities and must utilize the services of a quantum server to prepare and later measure quantum states.

As it turns out, it's possible to prove that even if the server is adversarial, security is still possible! All required concepts and notation related to quantum communication and computation will be introduced in this talk.

Walter O. Krawec is an Assistant Professor of Computer Science and Engineering at the University of Connecticut, Storrs CT. He received a Ph.D. in Computer Science from Stevens Institute of Technology, Hoboken NJ in 2015 and an MA in Mathematics from the University at Albany, SUNY in 2010. His research interests are primarily in quantum cryptography and especially quantum key distribution. He is also interested in general quantum information theory and discovering new applications of quantum communication.

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