We present protocols for quantum key distribution in a prepare-and-measure setup with an asymmetric level of trust. While the device sender (Alice) is partially characterized, receiver's (Bob's) treated as black-box. The security based on assumption that Alice's prepared states have limited overlaps, but no explicit bound Hilbert space dimension required. are immune t...

The following picture shows the test omission rate and predicted area as a function of the cumulative threshold, averaged over the replicate runs. The omission rate should be close to the predicted omission, because of the definition of the cumulative threshold. The next picture is the receiver operating characteristic (ROC) curve for the same data, again averaged over the replicate runs. Note ...