Seminar: Dr Zixin Huang, The University of Sheffield
Private-Key Quantum Cryptography with Boson Sampling devices
A quantum private-key encryption protocol, based on multi-photon interference in linear optics networks.
Image: Umberto & Sylvie Tittle / Unsplash
Title: Private-Key Quantum Cryptography with Boson Sampling devices
Presenter: Dr Zixin Huang, The University of Sheffield
Abstract:
We introduce a quantum private-key encryption protocol based on multi-photon interference in linear optics networks. Our protocol is based on the physics behind Boson Sampling, and we show that it is already hard to break, even for a quantum computer, in the regime of small photon number and modes.
We present an information-theoretic proof of the security of our protocol against an eavesdropper with unlimited (quantum) computational power but time-limited quantum storage, and in the presence of loss and noise.
This protocol is shown to be optimal in the sense that it asymptotically encrypts all the information that passes through the interferometer using an exponentially smaller private key. Our scheme requires only moderate photon numbers and is experimentally feasible with current technology.
