(page 22) Reference architectures are templates for implementing cloud security, typically generalized (e.g. an IaaS security reference architecture). They can be very abstract, bordering on conceptual, or quite detailed, down to specific controls and functions.

D. Reference architectures. Reference architectures in the context of cloud security provide standardized and proven designs, patterns, and templates for implementing security controls and best practices in a cloud environment. These architectures serve as guides or blueprints that organizations can use to design and deploy their cloud infrastructure with security in mind. Reference architectures typically cover various aspects of cloud security, including network architecture, data protection, identity and access management, logging and monitoring, and incident response. They are designed to address common security challenges and provide organizations with a starting point for implementing effective security controls in their specific cloud environment. By utilizing reference architectures, organizations can benefit from the collective knowledge and experience of cloud security experts and leverage proven practices to enhance the security of their cloud deployments.