7.2 End-to-End Establishment of Application Link Key
In a secure network, when two devices need to communicate on a secure link with each other, the devices must request a link key from the trust center.
The following figure illustrates link key establishment between two routers. The router
0x0b6f
requests a link key from the trust center (see packet
#24
) to communicate with the router 0x3779
.
The trust center uses the
Transport Key
command to send the link key to
both the routers. The link key is applied in further data exchange between the routers.
Packet #47
uses this link key. The following figure illustrates the
link key.