The NIACAP roles are nearly the same as the DITSCAP roles. Four minimum participants (roles) are required to perform a NIACAP security assessment: IS program manager: The IS program manager is the primary authorization advocate. He is responsible for the Information Systems (IS) throughout the life cycle of the system development. Designated Approving Authority (DAA): The Designated Approving Authority (DAA), in the United States Department of Defense, is the official with the authority to formally assume responsibility for operating a system at an acceptable level of risk. Certification agent: The certification agent is also referred to as the certifier. He provides the technical expertise to conduct the certification throughout the system life cycle. User representative: The user representative focuses on system availability, access, integrity, functionality, performance, and confidentiality in a Certification and Accreditation (C&A) process. Answer: D is incorrect. Information Assurance Manager (IAM) is one of the key participants in the DIACAP process.