After you decide which LUs may hold conversations, you can create RACF® profiles to define more security characteristics for LUs and for conversations between the LUs. To do so, create RACF profiles in the APPCLU class. These profiles differ, depending on whether the LU is a member of a VTAM® generic resource group:

• For information about protecting LUs that are not members of a generic resource group, see Defining LU-to-LU Access Authority for a Specific LU.
• For information about protecting LUs that are members of a generic resource group, see Defining LU-to-LU Access Authority for LUs in a VTAM Generic Resource Group.

You may also define session keys and conversation security levels for LU-to-LU security; see:

• Defining LU-to-LU Session Keys, or
• Defining Conversation Security Levels that Sessions Allow.