  Quantum Key Distribution (QKD) is an approach for establishing symmetrical
binary keys between distant users in an information-theoretically secure way.
In this paper we provide an overview of existing solutions that integrate QKD
within the most popular architecture for establishing secure communications in
modern IP (Internet Protocol) networks - IPsec (Internet Protocol security).
The provided overview can be used to further design the integration of QKD
within the IPsec architecture striving for a standardized solution.
