Security Certificates enables you to setup resources that are authorized to work on certain projects.  If an operation requires a security certificate, only those resources that have the corresponding security certificate can work on that operation.  If selected to be applied during a schedule run, the scheduler will select only those resources that have a security certificate to work on an operation that requires a security certificate.

The Job Identification is used to identify the security certificate for all the job's operations.  

The term Security Certificate can be changed using Terms and Settings.

Also see:

Resource Security Certificates tab

Schedule Options