Which NIST publication is the standard for Zero Trust Architecture, focusing on security based on resources such as users, services, and workflows instead of network boundaries?

The correct choice emphasizes NIST 800-207, which is specifically designed to provide guidelines and standards for Zero Trust Architecture. This publication addresses crucial principles of security that shift the focus from traditional perimeter-based defenses to a model where security is determined by the resources involved, including users, services, and workflows.

NIST 800-207 articulates the fundamental aspects of Zero Trust, advocating for a more granular approach to security that assesses the trustworthiness of users and devices on a continuous basis. This is in stark contrast to conventional security models that often prioritize network boundaries, which can lead to vulnerabilities if those boundaries are breached.

By adopting the Zero Trust model outlined in NIST 800-207, organizations can enhance their ability to protect sensitive data and systems against modern threats, making security decisions based on context rather than solely on where a connection is made. This aligns closely with current cybersecurity best practices and evolving threat landscapes, thus positioning NIST 800-207 as the authoritative source for implementing Zero Trust Architecture effectively.