In LSF, authentication can come by means of external authentication using the LSF eauth executable, or by means of identification daemons (identd). External authentication provides the highest level of security and is the default method of authentication in LSF. It is installed in the directory specified by the LSF_SERVERDIR parameter in the lsf.conf file.
By default, eauth uses an internal key to encrypt authentication data, but you may use a customized external key to improve security. You can also write your own eauth executable to meet the security requirements of your cluster, using the default eauth as a demonstration of the eauth protocol.