What is the FIRST step in developing a security test and its evaluation?

The first step in developing a security test and its evaluation is to identify all applicable security requirements. Security requirements are the specifications or criteria that define the security objectives, expectations, and needs of the system or network. Security requirements may be derived from various sources, such as business goals, user needs, regulatory standards, contractual obligations, or best practices. Identifying all applicable security requirements is essential to establish the scope, purpose, and criteria of the security test and its evaluation. Determining testing methods, developing testing procedures, and identifying people, processes, and products not in compliance are subsequent steps that should be done after identifying the security requirements, as they depend on the security requirements to be defined and agreed upon. References: : Security Testing - Overview : Security Testing - Planning