Cryptographic quantum metrology

Understand

We develop a general framework for parameter estimation that allows only trusted parties to access the result and achieves optimal precision.

• The protocols are designed such that adversaries can access some information indeterministically, but only at the risk of getting caught (cheat-sensitivity); under the assumption that the adversary can access the channel only once, then the protocol is unconditionally secure.
• By combining techniques from quantum cryptography and quantum metrology, we devise cryptographic procedures for single parameter estimation when an arbitrary number of parties are involved.