A userid and password might be required for each conversation that takes place between the CICS® Transaction Gateway or CICS Universal Client and the CICS server, depending on how the CICS Transaction Gateway or CICS Universal Client and the CICS server have been configured.
EPI security involves:
The userid and password can be set at terminal or connection level. Both types can be set by the user application. If there are no userid and password values for the terminal, the values for the connection are used. For information about how to set the connection userid and password, refer to the CICS Transaction Gateway: Administration book for your operating system. The requirement for a userid and password depends on the CICS server configuration.