---
url: 'https://www.corbado.com/faq/what-is-nist-authentication-guidelines-significance'
title: 'What is NIST & why are its guidelines significant for auth?'
description: 'NIST sets global authentication standards, ensuring secure digital identity frameworks. Learn why its guidelines matter for authentication.'
lang: 'en'
---

# What is NIST & why are its guidelines significant for auth?

## What is NIST?

The **National Institute of Standards and Technology (NIST)** is a **U.S. federal agency**
under the **Department of Commerce** that develops **technology, metrics, and standards**
to enhance economic security and innovation. In the field of **cybersecurity and digital
identity**, [NIST](https://www.corbado.com/blog/nist-passkeys) plays a **key role** by setting authentication
guidelines that influence both public and private sector security policies worldwide.

## Why Are NIST’s Authentication Guidelines Important?

[NIST](https://www.corbado.com/blog/nist-passkeys)’s **SP 800-63B Digital Identity Guidelines** define best
practices for **secure authentication**, ensuring that organizations implement
**phishing-resistant, reliable, and scalable**
[identity verification](https://www.corbado.com/blog/digital-identity-guide) methods. In its most recent update,
Revision 4 of SP 800-63B, [NIST](https://www.corbado.com/blog/nist-passkeys) introduced important changes to
strengthen authentication practices. The revision includes updated general requirements
designed to support Authentication Assurance Level 2 (AAL2), helping organizations meet
stronger security needs without unnecessary complexity. Notably, the revision also
recognizes the growing role of passkeys, reflecting the industry shift toward more
user-friendly and [phishing](https://www.corbado.com/glossary/phishing)-resistant authentication methods. These
guidelines are significant because:

### 1. They Establish Global Security Standards

- NIST’s authentication framework influences regulations beyond the U.S., shaping
  [digital identity](https://www.corbado.com/blog/digital-identity-guide) policies for **enterprises, government
  agencies, and tech providers** worldwide.
- Organizations aligning with **NIST SP 800-63B** ensure compliance with high-security
  standards.

### 2. They Define Authentication Assurance Levels (AALs)

- NIST categorizes authentication mechanisms into **AAL1, AAL2, and AAL3**, guiding
  organizations on security requirements based on risk levels.
- With recent updates, **synced passkeys** have been **recognized as AAL2-compliant**,
  while **device-bound passkeys** meet **AAL3** requirements.

### 3. They Promote Phishing-Resistant Authentication

The guidelines endorse **passkeys, FIDO2, and WebAuthn**, reducing reliance on **passwords
and vulnerable MFA methods (e.g., SMS OTPs)**.

### 4. They Drive Adoption in Regulated Industries

- Industries like **banking, healthcare, and government** depend on NIST’s recommendations
  to implement **robust identity verification**.
- Federal agencies and contractors often **require compliance** with NIST’s authentication
  standards.

By following **NIST authentication guidelines**, organizations **enhance security**,
**reduce fraud**, and **future-proof their authentication systems** with **passkeys and
phishing-resistant MFA**.

## Read the full article