The questions for the reading on Parallelizing Security Checks

This paper describes a system called Speck that runs security checks in parallel with execution of the program, instead of running them sequentially within the body of the program.
For a given security check, name the parameters that determine how many checks will run in parallel in a given execution of a program. List as many as you can (at least 3) Describe the effect of each parameter and explain to what extent each parameter is under the control of the Spec system.