Which of the following is NOT one of the five attributes of Information Assurance?

The five attributes of Information Assurance typically include confidentiality, integrity, availability, authenticity, and non-repudiation. Each of these attributes plays a critical role in protecting information and ensuring its safe and reliable use.

Confidentiality ensures that sensitive information is accessible only to authorized users. Integrity maintains the accuracy and completeness of data, safeguarding it from unauthorized alterations. Authenticity verifies the identity of users and the legitimacy of data and transactions. Similarly, non-repudiation ensures that individuals cannot deny the authenticity of their actions or communications.

Efficiency, while important in various contexts such as network performance or resource management, does not fit within the core framework of Information Assurance attributes. The focus of Information Assurance is primarily on protecting data rather than optimizing processes or improving efficiency. Therefore, efficiency is not considered one of the key attributes in this context.