You can control access by a transaction to the following types of resource: 
            
            
               
               - Files 
- Transient data queues 
- Temporary storage queues 
- Journals 
- Other transactions 
To enable resource security, do the following: 
            
            
               
               - Specify that a transaction is to perform resource security checking, by checking Security: Resource Level Checking on the PCT page in ESMAC for the transaction. (By default, transactions do not perform resource security checking.) 
               
- Specify a set of resource keys in the resource table entry (for example, the FCT entry for a file). Each resource key is a
                  number in the range 1 through 24. 
               
- Specify a set of resource keys in a user's SNT entry. A user can access a resource if one or more of the resource keys for
                  the resource matches a resource key specified in that user's SNT entry. 
               
The figure below illustrates the process of resource key checking. 
            
            
               
               Figure 1. Resource key checking
                  
                  