Role of Steering Inequality in Quantum Key Distribution Protocol

Violation of Bell's inequality has been the mainspring for secure key generation in an entanglement assisted Quantum Key Distribution (QKD) protocol. Various contributions have relied on violation Bell inequalities to build appropriate QKD Residing between nonlocality and entanglement, there exists a hybrid trait correlations, namely correlations exhibited through steering inequalities. However, such not put use protocols as much their stronger counterpart, violations. In present work, we show that violations Cavalcanti–Jones–Wiseman–Reid (CJWR) can act ingredients We work with arbitrary two-qubit entangled states, characterize them by utility protocols. The characterization is based quantum bit error rate CJWR inequality. Furthermore, subsequent applications local filtering operations initially states exhibiting no violation, lead necessary successful implementation An additional vindication our protocol provided absolutely Bell–Clauser–Horne–Shimony–Holt (Bell–CHSH) which remain Bell–CHSH even under global unitary operations.Quanta 2023; 12: 1–21.