https: keyFile
                                                    Path and filename of a private key.
| 
                                                                     Value  | 
                                                                
                                                                     String. Points to a key in PEM format. (Specify a file relative to TEXTPROC_HOME or enter an absolute file path.) For the recommended path, see Copying certificates and keys.  | 
                                                            
| 
                                                                     Default  | 
                                                                
                                                                     ./keys/server.key  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     Set on the Nuance Text Processing Engine service in Management Station. If not using Management Station, set in the NTpE service configuration file (User-ntpexx.yaml, see Configuration roadmap).  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Typically changed once, when setting up secure connections during the transition from development to production environments. See Securing connections with SSL/TLS.  | 
                                                            
NTpE uses this parameter in its role as a server when providing authentication to a client.