@startuml Mtrk protocol communication

actor Client1

node Server [
Server
]
node GW1 [
GW1
]
node GW2 [
GW2
]
node GW3 [
GW3
]
node GW4 [
GW4
]
node GW5 [
GW5
]
node GW6 [
GW6
]
actor Client2

Client1 -> GW1:(GK1(GK2(GK3((CK2)Payload))))
GW1 -> GW2:(GK2(GK3((CK2)Payload)))
GW2 -> GW3:(GK3((CK2)Payload))
GW3 -d-> Server:((CK2)Payload)

Client2 -> GW4:(GK4(GK5(GK6(CK2)Request))))
GW4 -> GW5:(GK5(GK6(CK2)Request)))
GW5 -> GW6:(GK6(CK2)Request))
GW6 -u-> Server:((CK2)Request)


@enduml