Which standard addresses IT security techniques, including the introduction and general model, as well as functional and assurance components?

The correct choice relates to ISO standard 15408, also known as the Common Criteria for Information Technology Security Evaluation. This standard provides a comprehensive framework for evaluating the security features and capabilities of IT products and systems. It introduces a general model of IT security and delineates functional components, specifying what a product or system needs to have in order to meet certain security standards.

ISO 15408 focuses on defining security assurance requirements and evaluating the security functionality of various IT products. This standard serves as a benchmark for product security evaluations, enabling organizations to assess whether products meet specific security requirements. Its structured approach assists in the design, development, and evaluation stages of IT systems, ensuring that they are robust against potential security threats.

The other options discuss different aspects of IT security but do not encompass the same breadth. For instance, NIST 800-61 is focused on incident handling procedures rather than a holistic evaluation framework. NIST 800-84 deals with the creation of contingency plans, while NIST 800-53 specifies security and privacy controls for federal information systems but does not provide an overarching model or standard for the evaluation process. Each of these has its specific focus, making ISO 15408 the most suitable choice for addressing comprehensive IT security techniques.