Cryptographic quantum metrology

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.