  Quantum communication and quantum metrology are widely compelling
applications in the field of quantum information science, and quantum remote
sensing is an intersection of both. Despite their differences, there are
notable commonalities between quantum communication and quantum remote sensing,
as they achieve their functionalities through the transmission of quantum
states. Here we propose a novel quantum integrated sensing and communication
(QISAC) protocol, which achieves quantum sensing under the Heisenberg limit
while simultaneously enabling quantum secure communication through the
transmission of entanglements. We have theoretically proven its security
against eavesdroppers. The security of QISAC is characterized by the secrecy
capacity for information bit as well as asymmetric Fisher information gain for
sensing. Through simulations conducted under the constraints of limited
entanglement resources, we illustrate that QISAC maintains high accuracy in the
estimation of phase. Hence our QISAC offers a fresh perspective for the
applications of future quantum networks.
