Fabian Furrer: Continuous-Variable Protocols in the Noisy-Quantum-Storage Model

Fabian Furrer, Nippon Telegraph and Telephone (NTT) Corporation Basic Research Laboratories, Japan

We present a protocol for oblivious-transfer that can be implemented with an optical continuous-variable system, and prove its security in the noisy-storage model. This model assumes that the malicious party has only limited capabilities to store quantum information at one point during the protocol. The security is quantified by a trade-off relation between
generated quantum uncertainty and the classical capacity of the memory channel. As our main technical tool, we study and derive uncertainty relations for continuous-variable systems that are essential to analyse security in the noisy quantum-storage model.