When security is enforced at TRS (Security=yes), every user who sends requests to a transaction processing region through TRS must be defined to that TRS. A user definition includes this information:
The user’s login ID and password
The transaction processing region (host) login ID and password in uppercase
(LU 6.2 only) The assigned connection group that the user is permitted to use to access a mainframe
The assigned transaction group defining the collection of RPCs the user is permitted to use
The permission to perform TRS control operations
