Specific enabling systems and services may be required to support the security aspects of the design definition process. These enabling systems and services are relied upon to provide the capability to realize and support the system-of-interest, and therefore impact the trustworthiness of the system. The design definition-oriented security concerns for enabling systems and services used to support the design definition process must be determined and captured as security requirements and as security-driven constraints for the interfaces and interactions with the system-of-interest. The Validation process is used to confirm that enabling systems and services achieve their intended use and do so with an appropriate level of trustworthiness.