A method of integrating quantum key distribution (QKD) with Internet protocol security (IPSec) to improve the security of IPSec. Standard IPSec protocols impose limits on the frequency at which keys can be changed. This makes efforts to improve the security of IPSec by employing quantum keys problematic. The method includes increasing the size of the Security Association (SA) Table in a manner that enables a high key change rate so that the quantum keys can be combined with the classical keys generated by Internet Key Exchange (IKE). The invention includes a method of creating the SA Table by combining quantum keys generated by the QKD process with classical keys generated by the IKE process, thereby enabling QKD-based IPSec.