HP-UX IPSec version A.02.00 Administrator's Guide

HP-UX IPSec Overview
Manual Keys
Chapter 142
Manual Keys
Manual keys are an alternative to IKE. Instead of using IKE to
dynamically generate and distribute cryptography keys for ESP and AH,
the cryptography keys are static and manually distributed. Because
manual keys are static, using them is less secure than using IKE.
Manual keys are typically used only when the remote system does not
support IKE, or in Mobile IPv6 topologies.