Meaning – A cryptographic session, or an LU-LU session is one in which a function management data (FMD) request may be enciphered before it is transmitted and deciphered after it is received.
LU-LU session initiation generally begins when the session manager in an LU submits a session-initiation request to the appropriate control point. In a subarea network, it can be either the system services control point controlling the LU’s domain or, in the case of a type 2.1 peripheral node, the LU’s local control point (CP).
LU-LU sessions can be initialised in the following different ways –
They can be initiated by either of the participating logic units.