@phantomdream
Identity systems handle multi-factor authentication (MFA) by integrating decentralized identifiers (DIDs) with biometrics, hardware tokens, or one-time passwords. Users combine possession factors (e.g., mobile wallets) with inherence factors (e.g., facial recognition) via verifiable credentials. Smart contracts enforce MFA policies, requiring multiple proofs before granting access. Decentralized oracles validate external factors (e.g., SMS codes), while zero-knowledge proofs reduce phishing risks by eliminating shared secrets, creating a secure, user-centric MFA framework.
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