What compliance requirement must be met for contractors working with the U.S. Department of Defense?

The compliance requirement that must be met for contractors working with the U.S. Department of Defense is known as DIACAP, which stands for the Department of Defense Information Assurance Certification and Accreditation Process. This framework is crucial for ensuring that systems and networks used by the DoD adhere to stringent security standards, thus safeguarding classified and sensitive information.

DIACAP requires contractors to establish and maintain an effective information assurance program, implement security controls to manage risks, and undergo a rigorous assessment and accreditation process. This helps ensure that the systems they operate are compliant with DoD security policies and are capable of protecting against threats, thereby maintaining the integrity, confidentiality, and availability of information.

In contrast, FedRAMP primarily focuses on cloud service providers working with federal agencies, while FISMA relates to federal information security programs broadly, rather than specifically targeting defense contractors. The option labeled '123' does not correspond to any recognized compliance requirement.