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NIST Digital Identity Guidelines (SP 800-63)

NIST Digital Identity Guidelines (SP 800-63):

The NIST SP 800-63 Digital Identity Guidelines are a set of standards published by the U.S. National Institute of Standards and Technology that provide technical requirements for identity proofing, authentication, and federation. They are often used by U.S. federal agencies and have influence globally as best practices. The guidelines define levels of assurance in three areas: IAL (Identity Assurance Level – how thoroughly identity is proofed), AAL (Authentication Assurance Level – the strength of the authentication process), and FAL (Federation Assurance Level – the robustness of federated assertions).

For instance, IAL1 might be minimal (self-asserted identity), IAL2 requires presenting and validating government ID (possibly remotely with checks), and IAL3 might require in-person verification of documents. Similarly, AAL2 might mean two-factor authentication, whereas AAL3 could mean hardware cryptographic authenticators with a high level of resistance to phishing (like smart cards).

The guidelines also notably discouraged some practices – e.g., earlier versions deprecated SMS OTP as a lone 2FA method for higher assurance due to security concerns, though they later allowed it with some caveats at AAL2. They encourage the use of biometrics as one factor only if a physical or knowledge factor is also used (not standalone for highest security). The standards discuss federation (FAL1-3) in terms of token protections and signatures. For those building identity systems, NIST 800-63 is like a bible of how to do it right – from how to do a secure ID document check to how to handle authenticator lifecycle (enrollment, revocation, etc.). In fact, many regulatory frameworks and industry standards borrow language from NIST. For instance, the US federal government and contractors must meet certain levels for their login systems, which means implementing, say, AAL2 – typically meaning MFA with secure protocols.

Overall, NIST’s guidelines improve digital trust by providing a research-backed foundation for strong identity practices, pushing organizations to move away from weak passwords and simplistic proofing, and towards a more rigorous, standardized approach to saying “you are who you claim online, and we’ve verified it to X degree of confidence.”

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Are deepfakes illegal?

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