Which organization standardizes encryption methods used in line security systems?

• A. National Institute of Standards and Technologies (NIST)
• B. International Organization for Standardization (ISO)
• C. Institute of Electrical and Electronics Engineers (IEEE)
• D. World Health Organization (WHO)

Answer: (A)

Encrypting communications in line security systems relies on established standards so devices from different vendors can work together securely. The organization that sets these cryptographic standards in the United States, including approved algorithms (like AES) and guidance on key management and security controls, is NIST. Its federal standards and publications guide how encryption should be implemented to meet security requirements, making it the most relevant and authoritative source for line security systems. ISO also creates international encryption standards, but in this context NIST is the primary reference for standardized encryption methods used in security devices and monitoring networks. IEEE covers broad engineering standards, not specifically encryption methods, and the World Health Organization is unrelated to encryption standards.