The security of the Quantum Key Distribution (QKD) is coming from the fundamental principle of quantum physic where any action on the quantum system that tries to extract the information will be considered generally as a measurement which basically will modify the system. The protocol of B92 has been proven unconditionally secure by various of study based on the entanglement distillation protocol (EDP) technique. However, based on this technique it does not prove composable security which is actually important in privacy amplification in order to guarantee the partial key shared cannot revoke the security of the system. We review the security analysis of this system and its implementation in this work.
