The orange book and its successors were collectively referred to as the:

The Trusted Computer System Evaluation Criteria, commonly referred to as TCSEC, is a pivotal standard in the realm of computer security. Developed by the United States Department of Defense, the TCSEC outlines a framework for evaluating the security features and the assurance level of computer systems. This standard is often associated with various classifications, such as "A" through "D," indicating the degree of security offered by a system.

The use of the term "Trusted" reflects the criteria's focus on systems that can be trusted to operate securely in sensitive environments, making it critical for government and military operations. By establishing such guidelines, the TCSEC provides a common language to describe system security, which aids in both implementation and evaluation processes.

Understanding TCSEC is essential for professionals in cybersecurity, as it laid the foundation for subsequent evaluation standards, shaping how security assessments are conducted even today. The other options, while they contain similar phrases, do not correctly represent the established name of the criteria, thus reaffirming that Trusted Computer System Evaluation Criteria is the accurate term.